We have a .net application which is running on 4.5.2 framework. Application working fine with SolidWorks 2020. Now we have installed SolidWorks 2024 into that system. After that application is failing at Document Manager API call.

Throwing below error.

80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)

I have gone through few sites and collected few suggestions like,