Delphi Seattle, Compile Error: F2051 Unit System.SysUtils was compiled with a different version of "".GetMappedFileName - delphi

Question

since some days, something weird happened.
Problem:
I always get "Compile Error: F2051 Unit System.SysUtils was compiled
with a different version of “”.GetMappedFileName" No precise code line
to mention. Also the same problem if I make a simple project with
only one call to a sysutils command.
Our situation: me and my collegueare developping on the same project. We use JEDI to exchange our sources and to keep track of changes.
LAst, I was downloading his changed sources. Everything went well and I was ready to go on.
I refreshed all my files and tried to compile, build and run the new sources on my computer.
Then it got weird. While compiling, I got this error:
F2051 Unit System.SysUtils was compiled with a different version of "".GetMappedFileName
I checked our versions of delphi standard lib's and also the versions of our other components installed and everything matches.
Then I went on internet-tip-shopping. I found some similar problems, but non of the possible solutions worked for me...
This are some things I tried yet:
setup a smal simple project with only the beep-function from sysUtils
repair of delphi Seattle
Looked at my Library path, browsing path, ...
Cleared the dcu's of my project
I also tried a "dir /s" search to find different (wrong?) versions of System.SysUtils.*
Found .PAS
1 for every installed version, 14, 15, 16, 17 (non of the 14, 15, or
16 in my paths
C:\ProgramData{0DE47792-19BD-4AF4-B9CF-6378FBA44825}\sourcefileswin32\E1F130EB\D08CA8BE
C:\Users\All
Users{0DE47792-19BD-4AF4-B9CF-6378FBA44825}\sourcefileswin32\E1F130EB\D08CA8BE
Found .DCU
For all versions (14, 15, 16, 17)
For every export system (android, ios, ..)
Also in the ProgramData
Also in the All Users
You an find my library and browsing path at the end of this post.
Some of the internet sites I used to try to solve this:
Why are my units "compiled with a different version" of my own files?
F2051: Unit %s was compiled with a different version of %s
https://translate.google.com/translate?hl=en&sl=auto&tl=en&u=http%3A%2F%2Fdelphi4arab.net%2Fforum%2Fshowthread.php%3Fmode%3Dlinear%26tid%3D4700%26pid%3D24332
[DCC Fatal Error]: F2051 Unit ApFileIO was compiled with a different version of ***.{ApCollections}TLinkList<uPublic.TApObject>
Does anyone have an idea or a clue to get out off this. Cause I can't go on with any of my projects since this happened.
This is my Library path for Win32:
$(BDS)\Imports;
$(BDS)\LIB;
$(BDS)\Bin;
$(BDSCOMMONDIR)\Bpl;
$(BDSCOMMONDIR)\Dcp;
$(BDS)\include;
C:\Program Files (x86)\Neos Eureka S.r.l\EurekaLog 7\Lib\Common\;
C:\Program Files (x86)\Neos Eureka S.r.l\EurekaLog 7\Lib\Win32\Release\Studio23\;
C:\Program Files (x86)\Neos Eureka S.r.l\EurekaLog 7\Source\Extras;
$(BDS)\RBuilder\Lib\Win32;
C:\sources\Utilities;
C:\Program Files (x86)\Embarcadero\synaps\source\lib;
C:\Program Files (x86)\Embarcadero\Components;
C:\Program Files (x86)\Embarcadero\EmbeddedWB\Source;
C:\Program Files (x86)\Embarcadero\Ruler;
C:\Program Files (x86)\Embarcadero\paxCompilerXE10\package;
C:\Program Files (x86)\Embarcadero\Studio\17.0\source\rtl\win;
C:\Program Files (x86)\Devart\UniDAC for RAD Studio 10\Lib\Win32;
c:\program files (x86)\embarcadero\tms pack for firemonkey\win32;
C:\Program Files (x86)\Embarcadero\fgx_XE8\Library;$(DXVCL)\Library\RS23;
C:\Program Files (x86)\Embarcadero\RTC;
C:\Program Files (x86)\Embarcadero\Studio\17.0\lib\win32\release
This is my browsing path:
$(BDS)\source\rtl;
$(BDS)\SOURCE\RTL\SYS;
$(BDS)\source\rtl\win;
$(BDS)\source\rtl\common;
$(BDS)\SOURCE\VCL;
$(BDS)\SOURCE\XML;
$(BDS)\source\ToolsAPI;
$(BDS)\SOURCE\PROPERTY EDITORS;
$(BDS)\source\Internet;
$(BDS)\SOURCE\VCL\AppAnalytics;
$(BDS)\SOURCE\IBX;
$(BDS)\source\soap;
$(BDS)\source\Indy10\Core;
$(BDS)\source\Indy10\System;
$(BDS)\source\Indy10\Protocols;
$(BDS)\source\fmx;
$(BDS)\source\databinding\components;
$(BDS)\source\databinding\engine;
$(BDS)\source\databinding\graph;
$(BDS)\source\data;
$(BDS)\source\data\ado;
$(BDS)\source\data\bde;
$(BDS)\source\data\cloud;
$(BDS)\source\data\datasnap;
$(BDS)\source\data\dbx;
$(BDS)\source\data\dsnap;
$(BDS)\source\data\Test;
$(BDS)\source\data\vclctrls;
$(BDS)\source\data\datasnap\connectors;
$(BDS)\source\data\datasnap\proxygen;
$(BDS)\source\DataExplorer;
$(BDS)\source\DUnit\Contrib\DUnitWizard\Source\Common;
$(BDS)\source\DUnit\Contrib\DUnitWizard\Source\Common\dunit;
$(BDS)\source\DUnit\Contrib\DUnitWizard\Source\DelphiExperts\Common;
$(BDS)\source\DUnit\Contrib\DUnitWizard\Source\DelphiExperts\DUnitProject;
$(BDS)\source\DUnit\Contrib\DUnitWizard\Source\DelphiExperts\DUnitProject\dunit;
$(BDS)\source\DUnit\src;
$(BDS)\source\DUnit\tests;
$(BDS)\source\Experts;
$(BDS)\source\indy\abstraction;
$(BDS)\source\indy\implementation;
$(BDS)\source\indyimpl;
$(BDS)\source\LiveTile;
$(BDS)\source\Property Editors\Indy10;
$(BDS)\source\soap\wsdlimporter;
$(BDS)\source\Visualizers;
$(BDS)\source\xtab;
$(BDS)\source\DUnit\Contrib\XMLReporting;
$(BDS)\source\DUnit\Contrib\XPGen;
$(BDS)\source\data\rest;
$(BDS)\source\data\firedac;
$(BDS)\source\tethering;
$(BDS)\source\DUnitX;
$(BDS)\source\data\ems;
$(BDS)\source\rtl\net;
$(BDS)\source\FlatBox2D;
$(BDS)\OCX\Servers;
C:\Program Files (x86)\Neos Eureka S.r.l\EurekaLog 7\Source\;
$(DXVCL)\ExpressCore Library\Sources;
$(DXVCL)\XP Theme Manager\Sources;
$(DXVCL)\ExpressGDI+ Library\Sources;
$(DXVCL)\ExpressCommon Library\Sources;
$(DXVCL)\ExpressLibrary\Sources;
$(DXVCL)\ExpressPageControl\Sources;
$(DXVCL)\ExpressDataController\Sources;
$(DXVCL)\ExpressEditors Library\Sources;
$(DXVCL)\ExpressWizard Control\Sources;
$(DXVCL)\ExpressBars\Sources;
$(DXVCL)\ExpressDocking Library\Sources;
$(DXVCL)\ExpressLayout Control\Sources;
$(DXVCL)\ExpressSpreadSheet\Sources;
$(DXVCL)\ExpressExport Library\Sources;
$(DXVCL)\ExpressQuantumTreeList\Sources;
$(DXVCL)\ExpressQuantumGrid\Sources;
$(DXVCL)\ExpressVerticalGrid\Sources;
$(DXVCL)\ExpressMemData\Sources;
$(DXVCL)\ExpressSpellChecker\Sources;
$(DXVCL)\ExpressTile Control\Sources;
$(DXVCL)\ExpressNavBar\Sources;
$(DXVCL)\ExpressSkins Library\Sources;
$(DXVCL)\ExpressPrinting System\Sources;
$(DXVCL)\ExpressPivotGrid\Sources;
$(DXVCL)\ExpressDBTree Suite\Sources;
$(DXVCL)\ExpressOrgChart\Sources;
$(DXVCL)\ExpressFlowChart\Sources;
$(DXVCL)\ExpressMap Control\Sources;
$(DXVCL)\ExpressScheduler\Sources;
$(DXVCL)\ExpressRichEdit Control\Sources;
$(DXVCL)\ExpressGauge Control\Sources

Answer 1

Problem solved, There was one instance in the library path that was responsible for the problem.
I disabled "C:\Program Files (x86)\Embarcadero\Studio\17.0\source\rtl\win;" from the library and all seems to work now.
My job now is to look why this file was in my library from my predecessor and try to look if there are any "strange" pas/dcu files in that directory so it should be needed in the path.
But that is now my job, Thx to all who helped me with sending some clues to get it solved.
So, it looks that I lost a lot of time by searching at other things
first instead of disabling 1 by 1 of the instances in my Library path.
This is the tip for today :-)