Could not load file or assembly 'MY DLL' or one of its dependencies. An attempt was made to load a program with an incorrect format.

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.NET4.5

Task "AspNetCompiler"
3> Task Parameter:PhysicalPath=C:\TFS2012\InSite Applications\InSiteWebAPI\Development\Source\InSiteWebAPI\obj\x64\Release\AspnetCompileMerge\Source
3> Task Parameter:TargetPath=C:\TFS2012\InSite Applications\InSiteWebAPI\Development\Source\InSiteWebAPI\obj\x64\Release\AspnetCompileMerge\TempBuildDir
3> Task Parameter:VirtualPath=/
3> Task Parameter:Debug=False
3> Task Parameter:Updateable=True
3> Task Parameter:ToolPath=C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319
3> AspNetCompiler: C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe -v / -p "C:\TFS2012\InSite Applications\InSiteWebAPI\Development\Source\InSiteWebAPI\obj\x64\Release\AspnetCompileMerge\Source" -u "C:\TFS2012\InSite Applications\InSiteWebAPI\Development\Source\InSiteWebAPI\obj\x64\Release\AspnetCompileMerge\TempBuildDir"
3> AspNetCompiler: Microsoft (R) ASP.NET Compilation Tool version 4.0.30319.17929
3> AspNetCompiler: Utility to precompile an ASP.NET application
3> AspNetCompiler: Copyright (C) Microsoft Corporation. All rights reserved.
3> AspNetCompiler:
3>ASPNETCOMPILER(0,0): Error ASPCONFIG: Could not load file or assembly 'ClassAdi.Net' or one of its dependencies. An attempt was made to load a program with an incorrect format.
3> AspNetCompiler: The command exited with code 1.
3> Done executing task "AspNetCompiler" -- FAILED.
3> Done building target "AspNetPreCompile" in project "InSiteWebAPI.csproj" -- FAILED.
3>Done building project "InSiteWebAPI.csproj"

Posted 4-Mar-14 17:09pm

MukeshSinha

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PIEBALDconsult 4-Mar-14 23:44pm

I see that when I try to load an x86 assembly from an AnyCPU assembly. Check the target type of your project and see whether or not changing it to x64 solves it.

MukeshSinha 4-Mar-14 23:53pm

Thanks,
My assembly is x64 bit and i have already set target type of project x64 i got same issue..

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Bernhard Hiller · Answer 1 · 2014-03-04T21:00:00

Solution 1

I think it is just the other way round to what PIEBALDConsult told you: your program is a 64bit program. And then you try to load a dll ('ClassAdi.Net') which is a 32bit dll, or a bit-ness agnostic dll which depends on a 32bit dll. Hence I'd suggest to set the target platform to x86.

Posted 4-Mar-14 21:00pm

Bernhard Hiller