Scenario
Generating a report is aborted with the error message Could not load file or assembly “SolutionsFactory.Dox42”.

Error message Could not load file or assembly “SolutionsFactory.Dox42”.
Solution
Check that the folder contains the specified DLL and the DLL is checked in.
Folder with SolutionsFactory.Dox42.dll
Reinstall the package if needed and check in the DLL.
Add to Source Control window