>the version at the client's site is probably compiled in release mode, which drops the line numbers. You can either compile in debug mode for testing or you can set the build properties for release. Right-click the project, properties make sure it's set to release configuration and under the build settings enable the "Generate Debugging Information" box. You'll need to deploy the .PDB files as well.

Ok, so that would explain why the Framework.dll was returning the line number but not the application itself. For the framework, I copied the PDB file but only the EXE for the application.

Thanks