ant fresh_install - Error - ant

I am not a code writer or technical guy. Trying to install Dspace with the guides provided. I am stucked in ant fresh_insatll process and here is the error message. Can someone help to overcome this.
Buildfile: C:\dspace-6.0-src-release\dspace\target\dspace-installer\build.xml
init_installation:
prepare_configs:
[mkdir] Created dir: C:\dspace-6.0-src-release\dspace\target\dspace-installer\config-temp
[copy] Copying 156 files to C:\dspace-6.0-src-release\dspace\target\dspace-installer\config-temp
[copy] Copying 1 file to C:\dspace-6.0-src-release\dspace\target\dspace-installer\config-temp
[copy] Copying 16 files to C:\dspace-6.0-src-release\dspace\target\dspace-installer\config-temp
init_configs:
[copy] Copying 1 file to C:\dspace\config
[delete] Deleting directory C:\dspace-6.0-src-release\dspace\target\dspace-installer\config-temp
test_database:
[java] 2016-11-08 07:17:42,129 WARN org.apache.commons.configuration.DefaultConfigurationBuilder # Internal error
[java] org.apache.commons.configuration.ConfigurationException: Cannot locate configuration source local.cfg
[java] at org.apache.commons.configuration.AbstractFileConfiguration.load(AbstractFileConfiguration.java:259)
[java] at org.apache.commons.configuration.AbstractFileConfiguration.load(AbstractFileConfiguration.java:238)
[java] at org.apache.commons.configuration.DefaultConfigurationBuilder$FileConfigurationProvider.getConfiguration(DefaultConfigurationBuilder.java:1455)
[java] at org.apache.commons.configuration.DefaultConfigurationBuilder$ConfigurationBeanFactory.createBean(DefaultConfigurationBuilder.java:1321)
[java] at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:390)
[java] at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:412)
[java] at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:426)
[java] at org.apache.commons.configuration.DefaultConfigurationBuilder.createConfigurationAt(DefaultConfigurationBuilder.java:855)
[java] at org.apache.commons.configuration.DefaultConfigurationBuilder.initCombinedConfiguration(DefaultConfigurationBuilder.java:719)
[java] at org.apache.commons.configuration.DefaultConfigurationBuilder.getConfiguration(DefaultConfigurationBuilder.java:622)
[java] at org.apache.commons.configuration.DefaultConfigurationBuilder.getConfiguration(DefaultConfigurationBuilder.java:587)
[java] at org.dspace.servicemanager.config.DSpaceConfigurationService.loadInitialConfig(DSpaceConfigurationService.java:494)
[java] at org.dspace.servicemanager.config.DSpaceConfigurationService.<init>(DSpaceConfigurationService.java:87)
[java] at org.dspace.servicemanager.DSpaceKernelImpl.start(DSpaceKernelImpl.java:148)
[java] at org.dspace.servicemanager.DSpaceKernelImpl.start(DSpaceKernelImpl.java:128)
[java] at org.dspace.app.launcher.ScriptLauncher.main(ScriptLauncher.java:49)
[java] 2016-11-08 07:17:44,969 WARN org.dspace.services.email.EmailServiceImpl # Couldn't get an email session from environment: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
[java]
[java] Attempting to connect to database
[java] Connected successfully!
[java]
[java] Database Type: postgres
[java] Database URL: jdbc:postgresql://localhost:5432/dspace
[java] Database Schema: public
[java] Database Username: dspace
[java] Database Software: PostgreSQL version 9.6.1
[java] Database Driver: PostgreSQL Native Driver version PostgreSQL 9.4.1211
[java] PostgreSQL 'pgcrypto' extension installed/up-to-date? false (not installed)
[java]
[java] WARNING: Required PostgreSQL 'pgcrypto' extension is NOT INSTALLED on this database.
[java]
[java] ** DSpace REQUIRES PostgreSQL >= 9.4 AND pgcrypto extension >= 1.1 **
[java]
[java] To install it, please connect to your DSpace database as a 'superuser' and manually run the following command:
[java]
[java] CREATE EXTENSION pgcrypto;
[java]
[java] 2016-11-08 07:17:45,781 WARN org.dspace.services.sessions.SessionRequestServiceImpl # Request interceptor (org.dspace.services.events.SystemEventService$EventRequestInterceptor#52fd6efa) failed to execute on end (request-70-1478569665302): null


Did you enabled pgcrypto on your new made PostgreSQL database?
psql --username=postgres dspace -c "CREATE EXTENSION pgcrypto;"
See DSpace 6.0 manual, paragraph 4. Database Setup: https://wiki.duraspace.org/display/DSDOC6x/Installing+DSpace#InstallingDSpace-Installation

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Unable to run Selenium Webdriver script in Jenkins using Ant build.xml

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While running the run JAR step of build.xml, i am getting below error message:
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[java] Exception in thread "main" java.lang.NoClassDefFoundError: junit/framework/TestCase
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[java] ... 13 more
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The Crashlytics upload distribution task failed because it received invalid input

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Build Jython Err: "NoClassDefFoundError: org/antlr/Tool"

I tried to build Jython on my macbook pro, but got an error after simpley ant command.
$ jython-2.5.4-rc1-sources zzhao$ ant
Buildfile: /Users/jack/Dev/jython/jython-2.5.4-rc1-sources/build.xml
init:
needed-check:
clean-if-antlr-needed:
init:
clean-checkout-dir:
clean:
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[mkdir] Created dir: /Users/jack/Dev/jython/jython-2.5.4-rc1-sources/build/classes
[mkdir] Created dir: /Users/jack/Dev/jython/jython-2.5.4-rc1-sources/build/gensrc/org/python/antlr
[mkdir] Created dir: /Users/jack/Dev/jython/jython-2.5.4-rc1-sources/build/exposed
[mkdir] Created dir: /Users/jack/Dev/jython/jython-2.5.4-rc1-sources/dist
antlr_gen:
[java] Exception in thread "main" java.lang.NoClassDefFoundError: org/antlr/Tool
[java] Caused by: java.lang.ClassNotFoundException: org.antlr.Tool
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[java] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
BUILD FAILED
/Users/jack/Dev/jython/jython-2.5.4-rc1-sources/build.xml:496: Java returned: 1
Any idea to the problem?

Your build is failing in the "antlr_gen" target. The java task is missing the antlr jar from its classpath.
Can't help any further without an ANT build.xml to debug.

Ant Build Issue: NoClassDefFoundError

I'm new to Ant and this application. I'm not able to decode this error message.
C:\Eclipse\sources_int\external-sources>ant netstudy-generate-client
Buildfile: C:\Eclipse\sources_int\external-sources\build.xml
netstudy-generate-client:
[delete] Deleting directory C:\Eclipse\ext_sources_int\external-sources\build\generated_classe
s
[mkdir] Created dir: C:\Eclipse\sources_int\external-sources\build\generated_classes
[java] java.lang.NoClassDefFoundError: org/apache/cxf/tools/wsdlto/WSDLToJava
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[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[java] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
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[java] Exception in thread "main"
[java] Java Result: 1
BUILD FAILED
C:\Eclipse\sources_int\external-sources\build.xml:183: srcdir "C:\Eclipse\sources_int\
external-sources\build\generated_src" does not exist!

part of the ant build is trying to run a Java application. the main class (the Java class that contains a main method) cannot be found. check your path and make sure you are including the jar file that contains the class org.apache.cxf.tools.wsdlto.WSDLToJava.
possibly it is expecting to find this class in the directory it cannot find.

JBoss comes with wsconsume in order to generate the client. I was trying to enforce the use of wsdltojava but it didn't work and I have the same problem.
So try to use wsconsume .

Error while building an xtext project with ant: Generation of the Grammar classes fails

I am developing an xtext plug-in project for an eclipse application for my Bachelor thesis.
I want to do the 'Generate Xtext Artifacts' at runtime with an ant script executing the Mwe2Launcher class and do the generation in an temp folder.
I wrote an Activator to create in the temp folder a project folder and copy the mwe2 file, my grammar file and the ant script.
Executing the Ant script leads to this error:
osgi> start 360
gen:
[java] 0 INFO StandaloneSetup - Registering platform uri 'C:\Foo-test'
[java] 2461 INFO DirectoryCleaner - Cleaning C:\Foo-test\org.xtext.example.foobar\..\org.xtext.example.foobar\src-gen
[java] 2503 INFO DirectoryCleaner - Cleaning C:\Foo-test\org.xtext.example.foobar\..\org.xtext.example.foobar.ui\src-gen
[java] 3056 INFO LanguageConfig - generating infrastructure for org.xtext.example.foobar.Foo with fragments : ImplicitRuntimeFragment, ImplicitUiFragment, GrammarAccessFragment, EcoreGeneratorFragment, ParseTreeConstructorFragment, ResourceFactoryFragment, XtextAntlrGeneratorFragment, JavaValidatorFragment, ImportNamespacesScopingFragment, QualifiedNamesFragment, BuilderIntegrationFragment, GeneratorFragment, FormatterFragment, LabelProviderFragment, OutlineTreeProviderFragment, QuickOutlineFragment, QuickfixProviderFragment, JavaBasedContentAssistFragment, XtextAntlrUiGeneratorFragment, TypesGeneratorFragment, XbaseGeneratorFragment, CodetemplatesGeneratorFragment
[java] 6253 INFO GenModelHelper - Registered GenModel 'http://www.xtext.org/example/foobar/Foo' from 'file:/C:/Foo-test/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/Foo.genmodel'
[java] org.eclipse.emf.common.util.WrappedException: java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/FooPackage.java' is unmapped
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generateJava(AbstractGeneratorAdapter.java:1112)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenPackageGeneratorAdapter.generatePackageInterface(GenPackageGeneratorAdapter.java:467)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenPackageGeneratorAdapter.generateModel(GenPackageGeneratorAdapter.java:219)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenBaseGeneratorAdapter.doGenerate(GenBaseGeneratorAdapter.java:221)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generate(AbstractGeneratorAdapter.java:290)
[java] at org.eclipse.emf.codegen.ecore.generator.Generator.generate(Generator.java:617)
[java] at org.eclipse.emf.codegen.ecore.generator.Generator.generate(Generator.java:528)
[java] at org.eclipse.xtext.generator.ecore.EcoreGeneratorFragment.doGenerate(EcoreGeneratorFragment.java:144)
[java] at org.eclipse.xtext.generator.ecore.EcoreGeneratorFragment.generate(EcoreGeneratorFragment.java:211)
[java] at org.eclipse.xtext.generator.CompositeGeneratorFragment.generate(CompositeGeneratorFragment.java:81)
[java] at org.eclipse.xtext.generator.LanguageConfig.generate(LanguageConfig.java:108)
[java] at org.eclipse.xtext.generator.Generator.generate(Generator.java:352)
[java] at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:126)
[java] at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
[java] at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
[java] at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
[java] at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
[java] at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:97)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:73)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:76)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
[java] Caused by: java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/FooPackage.java' is unmapped
[java] at org.eclipse.emf.ecore.resource.impl.PlatformResourceURIHandlerImpl.createOutputStream(PlatformResourceURIHandlerImpl.java:428)
[java] at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createOutputStream(ExtensibleURIConverterImpl.java:339)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.createOutputStream(AbstractGeneratorAdapter.java:1440)
[java] at org.eclipse.emf.mwe2.ecore.CvsIdFilteringGeneratorAdapterFactoryDescriptor$IdFilteringGenModelGeneratorAdapterFactory$IdFilteringGenPackageAdapter.createOutputStream(CvsIdFilteringGeneratorAdapterFactoryDescriptor.java:39)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generateJava(AbstractGeneratorAdapter.java:1104)
[java] ... 21 more
[java] org.eclipse.emf.common.util.WrappedException: java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Model.java' is unmapped
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generateJava(AbstractGeneratorAdapter.java:1112)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenClassGeneratorAdapter.generateInterface(GenClassGeneratorAdapter.java:123)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenClassGeneratorAdapter.generateModel(GenClassGeneratorAdapter.java:106)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenBaseGeneratorAdapter.doGenerate(GenBaseGeneratorAdapter.java:221)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generate(AbstractGeneratorAdapter.java:290)
[java] at org.eclipse.emf.codegen.ecore.generator.Generator.generate(Generator.java:617)
[java] at org.eclipse.emf.codegen.ecore.generator.Generator.generate(Generator.java:528)
[java] at org.eclipse.xtext.generator.ecore.EcoreGeneratorFragment.doGenerate(EcoreGeneratorFragment.java:144)
[java] at org.eclipse.xtext.generator.ecore.EcoreGeneratorFragment.generate(EcoreGeneratorFragment.java:211)
[java] at org.eclipse.xtext.generator.CompositeGeneratorFragment.generate(CompositeGeneratorFragment.java:81)
[java] at org.eclipse.xtext.generator.LanguageConfig.generate(LanguageConfig.java:108)
[java] at org.eclipse.xtext.generator.Generator.generate(Generator.java:352)
[java] at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:126)
[java] at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
[java] at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
[java] at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
[java] at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
[java] at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:97)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:73)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:76)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
[java] Caused by: java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Model.java' is unmapped
[java] at org.eclipse.emf.ecore.resource.impl.PlatformResourceURIHandlerImpl.createOutputStream(PlatformResourceURIHandlerImpl.java:428)
[java] at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createOutputStream(ExtensibleURIConverterImpl.java:339)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.createOutputStream(AbstractGeneratorAdapter.java:1440)
[java] at org.eclipse.emf.mwe2.ecore.CvsIdFilteringGeneratorAdapterFactoryDescriptor$IdFilteringGenModelGeneratorAdapterFactory$IdFilteringGenClassAdapter.createOutputStream(CvsIdFilteringGeneratorAdapterFactoryDescriptor.java:73)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generateJava(AbstractGeneratorAdapter.java:1104)
[java] ... 21 more
[java] org.eclipse.emf.common.util.WrappedException: java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Greeting.java' is unmapped
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generateJava(AbstractGeneratorAdapter.java:1112)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenClassGeneratorAdapter.generateInterface(GenClassGeneratorAdapter.java:123)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenClassGeneratorAdapter.generateModel(GenClassGeneratorAdapter.java:106)
[java] at org.eclipse.emf.codegen.ecore.genmodel.generator.GenBaseGeneratorAdapter.doGenerate(GenBaseGeneratorAdapter.java:221)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generate(AbstractGeneratorAdapter.java:290)
[java] at org.eclipse.emf.codegen.ecore.generator.Generator.generate(Generator.java:617)
[java] at org.eclipse.emf.codegen.ecore.generator.Generator.generate(Generator.java:528)
[java] at org.eclipse.xtext.generator.ecore.EcoreGeneratorFragment.doGenerate(EcoreGeneratorFragment.java:144)
[java] at org.eclipse.xtext.generator.ecore.EcoreGeneratorFragment.generate(EcoreGeneratorFragment.java:211)
[java] at org.eclipse.xtext.generator.CompositeGeneratorFragment.generate(CompositeGeneratorFragment.java:81)
[java] at org.eclipse.xtext.generator.LanguageConfig.generate(LanguageConfig.java:108)
[java] at org.eclipse.xtext.generator.Generator.generate(Generator.java:352)
[java] at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:126)
[java] at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
[java] at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
[java] at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
[java] at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
[java] at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:97)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:73)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:76)
[java] at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
[java] Caused by: java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Greeting.java' is unmapped
[java] at org.eclipse.emf.ecore.resource.impl.PlatformResourceURIHandlerImpl.createOutputStream(PlatformResourceURIHandlerImpl.java:428)
[java] at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createOutputStream(ExtensibleURIConverterImpl.java:339)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.createOutputStream(AbstractGeneratorAdapter.java:1440)
[java] at org.eclipse.emf.mwe2.ecore.CvsIdFilteringGeneratorAdapterFactoryDescriptor$IdFilteringGenModelGeneratorAdapterFactory$IdFilteringGenClassAdapter.createOutputStream(CvsIdFilteringGeneratorAdapterFactoryDescriptor.java:73)
[java] at org.eclipse.emf.codegen.ecore.generator.AbstractGeneratorAdapter.generateJava(AbstractGeneratorAdapter.java:1104)
[java] ... 21 more
[java] 6768 INFO EcoreGeneratorFragment - Diagnostic ERROR source=org.eclipse.emf.codegen.ecore code=0 Generating code data=[] [Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic ERROR source=org.eclipse.emf.codegen.ecore code=0 Generating Java interface org.xtext.example.foobar.foo.FooPackage failed with an unhandled exception data=[] [Diagnostic ERROR source=org.eclipse.emf.common code=0 IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/FooPackage.java' is unmapped data=[java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/FooPackage.java' is unmapped]], Diagnostic ERROR source=org.eclipse.emf.codegen.ecore code=0 Generating Java interface org.xtext.example.foobar.foo.Model failed with an unhandled exception data=[] [Diagnostic ERROR source=org.eclipse.emf.common code=0 IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Model.java' is unmapped data=[java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Model.java' is unmapped]], Diagnostic ERROR source=org.eclipse.emf.codegen.ecore code=0 Generating Java interface org.xtext.example.foobar.foo.Greeting failed with an unhandled exception data=[] [Diagnostic ERROR source=org.eclipse.emf.common code=0 IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Greeting.java' is unmapped data=[java.io.IOException: The path '/org.xtext.example.foobar/src-gen/org/xtext/example/foobar/foo/Greeting.java' is unmapped]], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[], Diagnostic OK source=org.eclipse.emf.common code=0 OK data=[]]
[java] 10385 INFO JavaValidatorFragment - generating Java-based EValidator API
[java] 13246 INFO Workflow - Done. BUILD SUCCESSFUL Total time: 27 seconds
The ".java" file which are unmapped were also not generated. The whole "/src-gen/...../foobar/foo" folder is missing.
I guess this is the reason and what should be fixed.
I really don't know, where the problem is. I already had a discussion in an Eclipse forum there you can find the build.xml but for another project, also an Activator class to activate the plugin and do the copy stuff and execute the ant script, also you find the mwe2 file I use.

You have to make sure that your register your temp folder as platform URI in your workflow. Xtext uses the platform:/resource URI scheme of EMF. Therefore, the platform root has to be registered in order to define the path mappings from absolute locations on the filesystem to logical locations according the the platform path. You could try to copy the .project file, too. I assume that will help if you already register the temp folder as platform path.

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