I have a project with multiple modules in it. The main module has a few vb class files in it that contain all of the business logic layer to access the database. For some reason this module has stopped creating a DLL but throws no errors at compile time? any idea where to start looking to trouble shoot. The other strange this is this module started showing errors about the dotnetnuke.entities.modules.portalmodulebase was not defined. I opened the file with the error and the error goes away and I build the module, and there are no errors?