Error migrating from GeneXus 9 to GeneXus Evo 2 U5 - migration

Question

I'm migrating a KB from GeneXus 9 to GeneXus Evo 2 U5. I'm using .Net and SQL Server, and followed the steps that are mentioned in GXTechnical but I have the following error:
========== DeveloperMenu Compilation started ==========
gxexec "C:\Modelos GX\Postulantes\DATAPROT\bldDevelopermenu.cs" -r:GxBaseBuilder.dll -arg:csc="C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe" -arg:mdlpath="C:\Modelos GX\Postulantes\DATAPROT"
Building bin\messages.spa.dll
Read in 570 resources from 'messages.spa.txt'
Writing resource file... Done.
Compilador de Microsoft (R) Visual C# 2008, versi¢n 3.5.30729.5420 para Microsoft (R) .NET Framework, versi¢n 3.5
(C) Microsoft Corporation. Reservados todos los derechos.
Error:Build error for target bin\GeneXus.Programs.Common.dll: .\GxObjectCollection.cs does not exist.
DeveloperMenu Compilation Failed
========== Assemblies Compilation started ==========
gxexec "C:\Modelos GX\Postulantes\DATAPROT\bldAssemblies.cs" -r:GxBaseBuilder.dll -arg:csc="C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe" /noconfig -arg:mdlpath="C:\Modelos GX\Postulantes\DATAPROT"
Error:Build error for target bin\GeneXus.Programs.Common.dll: .\GxObjectCollection.cs does not exist.
Assemblies Compilation Failed
Rebuild All Failed
What should I do to solve this problem?

Answer 1

Try these steps:
In GeneXus, go to Tools -> Explore Knowledgebase Directory
Delete all *.ari, *.0?? files
In GeneXus, go to Tools -> Explore Target Environment Directory
Delete that folder
In GeneXus, go to Build -> Rebuild All
If you keep having the same error, look at the entire output; there may be other errors before that one. If not, contact the GeneXus support team. If yes, search in google or search.genexus.com for solutions of that new errors.