I am getting the following error after attempting to add a LoadAction to a form.  Even after deleting the LoadAction, I still get this error.  I looked into the Sage.SnippetLibrary.csproj file and there are 2 identical entries:

<Compile Include="src\Sage.SnippetLibrary.CSharp.@.fc615c1b-9171-4592-b323-c0bac151e46a.codesnippet.cs" />

I try deleting one of the lines and deleting the entire build path directory, buyt it keeps regenerating.

<p>ERROR - c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.CSharp.targets(135,9):The item "src\Sage.SnippetLibrary.CSharp.@.ec9567f4-cbce-4824-be64-3667004e1d87.codesnippet.cs" was specified more than once in the "Sources" parameter.  Duplicate items are not supported by the "Sources" parameter.
 

INFO  - Done building project "Sage.SnippetLibrary.csproj" -- FAILED.

INFO  - Build FAILED.

ERROR - Failed to build Sage.SnippetLibrary.CSharp.

Probably you already solved it by yourself...

It seems something went wrong on your quickforms xmls.

First: changing manually files in the output folder is meaningless, as you already saw by yourself. The build process is going to overwrite everything.

You have to understand where the problem lies: try to open the file

"src\Sage.SnippetLibrary.CSharp.@.ec9567f4-cbce-4824-be64-3667004e1d87.codesnippet.cs"

and check what's inside.

Then, save the contents of the file and try to remove the file from where it's referenced (form load action, change action, business rule, whatever else).

Try to build and check for errors.

Then we will see what's next, to restore the lost snippet.

Hope it helps,

Alberto

I had the same problem. In my case I got the error because I had 2 smartparts (forms) with the same name in different entities.