I am having difficulty with a call to GetModuleByDefinition no longer working for DNN 5.1.2.

My code:

DotNetNuke.Entities.Modules.ModuleController objModules = new DotNetNuke.Entities.Modules.ModuleController();
DotNetNuke.Entities.Modules.ModuleInfo catalogModule;

catalogModule = objModules.GetModuleByDefinition(ps.PortalId, "Product Catalog"); // NULL OBJECT REFERENCE ERRORS 
 

Product Catalog is properly created and the friendly names match. However, the procedure ALWAYS returns a null object. This didn't used to be the case though.

I ran the stored proc "GetModuleByDefinition" with the same PortalID and Friendly Name, and I got the correct record returned. I even hard coded the TabID attribute for the catalogModule object, and the code works.

Any idea what changes (obvious or not) could cause this to fail now?

Thanks.