How do you fix “Could not load unit UnitName symbol information for TClassName. Do you want to try to find this file yourself?”

Question

In delphi, creating ActiveX controls was something that was once more popular than it is now. However it remains possible to create ActiveX controls with Delphi. This quest

Answer 1

There is an issue with the Library Path in Delphi, that for the ActiveX Control wizard to work properly, all sources needed for the parser to parse the unit in question must be in the library path. Since the ActiveX control wizard functions outside your project, your project search paths are NOT included in the list of folders that are used to parse the sources of the VCL control that is to be wrapped and turned into an ActiveX Control.

Solution:

Fix the library path.