Own linker command file not supported with Release build?

Bernd Erbe said:

It is not possible to use an own linker command file with the release configuration?

Yes, you can use your own linker command file with the Release configuration. But it looks like it has been excluded from build for some reason (either it was created this way or was excluded at a later time). To add the file back to the build, right-click on the file, go to Resource Configurations->Exclude from Build and uncheck the box for Release. This should add the file back into the build and it should no longer be grayed out.