Grails 2.1.2 - UNRESOLVED DEPENDENCIES Error - grails

Question

Am using Grails 2.1.2 on Windows 7 64-Bit System, at the time of compile it gives below error, kindly help me how to fix this.
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:: UNRESOLVED DEPENDENCIES ::
::::::::::::::::::::::::::::::::::::::::::::::
:: org.grails.plugins#mail;1.0-SNAPSHOT: not found
:: org.grails.plugins#tomcat;1.3.2: not found
:: org.grails.plugins#hibernate;1.3.2: not found
:: org.grails.plugins#csl-rest-lib;1.0: not found
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Answer 1

In BuildConfig.groovy, try to declare the dependencies:
dependencies {
compile 'org.grails.plugins:mail:1-0-SNAPSHOT'
compile 'org.grails.plugins:tomcat:1.3.2'
...
}

Answer 2

If your application was updated from grails 1.3 (<2.) or create from grails 2., you need to check plugins version on the grails plugins
For example, current version of mail plugin is 1.0.1 mail plugin
And also you need to check this dependencies at conf/BuildConfig.groovy. It must have part like this:
plugins {
build ":tomcat:$grailsVersion"
runtime ":hibernate:${grailsVersion}"
runtime ":resources:1.1.6"
...
Describe your plugins at plugins part.
And you need to check latest libraries for plugins and describe it like this:
dependencies {
// specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes eg.
compile('org.apache.poi:poi:3.7',
'org.apache.poi:poi-contrib:3.6',
'org.apache.poi:poi-ooxml:3.7',
'antlr:antlr:2.7.6',
'org.apache.ant:ant-apache-log4j:1.7.1'
..