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CIL generation: Duplicate type name within an assembly.

Issue Definition: I have been trying to generate a FULL CIL into our working live environment and suddenly it started giving me the following error;                           CIL generation: Duplicate type name within an assembly. Assessments: I did the following steps: 1- Strong recommendation, apply latest kernel build. Download link: Package: ———————————————————– KB Article Number (s) : 2957061 Language: All (Global) Platform: i386 Location: ( http://hotfixv4.microsoft.com/Microsoft%20Dynamics%20AX%202012%20R2/nosp/KB2957061/6.2.1000.7176/free/474249_intl_i386_zip.exe ) 2- To improve Compilation speed I did following changes : – For the full compile not catching all the syntax errors, please follow the  X++ code workaround suggestion: Under ClassesSysCompilerOutputstartCompilation Simply delete or out comment the marked line completely.       -For the CIL compiler performance: –      Make sure that the “Client/Server trace” under the client options is unchecked. –      Change the tier  from “client” to  “server” on ClassesSysCompileILdumpParallelBulkn method. – Further improvements is provided under: http://blogs.msdn.com/b/axtools/ 3- For the full CIL generation failure: Stop all AX client sessions Stop all AOS services Take a copy of XPPIL folder Take a copy of Model database Delete content of XPPIL folder Truncate SYSXPPAssembly table from SQL backend Retsart AOS Restart AX client Complete full XPP compilation Completet full CIL generation Happy Daxing!

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