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

Question

I am trying to use an application, the application is working fine, i am trying to edit the existing item in the application. while clicking the edit am getting the followin

Answer 1

Something I stumbled upon today for a DLL I knew was working fine with my VS2013 project, but not with VS2015:

Go to: Project -> XXXX Properties -> Build -> Uncheck "Prefer 32-bit"

This answer is way overdue and probably won't do any good, but if you. But I hope this will help somebody someday.

Answer 2

open cmd as Administrator then try to register in both location

Answer 3

My fix was to create Platform in configuration manager in visual studio, and set to x64

Answer 4

What is the target platform of your application? I think you should set the platform to x86, do not set it to Any CPU.

Answer 5

This is probably not a solution to your problem, but a suggestion just in case (I know I ran into a similar problem before but not with a .NET application).

If you are on a 64-bit machine, there are 2 regsvr32.exe files; One is in \Windows\System32 and the other one is in \Windows\SysWOW64.

You cannot register 64-bit COM-objects with the 32-bit version, but you can do it vice versa. I'd try registering your DLL with both regsvr32.exe files explicitly (i.e. typing "C:\Windows\System32\regsvr32.exe /i mydll.dll" and then "C:\Windows\SysWOW64\regsvr32.exe /i mydll.dll") and seeing if that helps...

Answer 6

[HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))

Just looking at the message it sounds like one or more of the components that you reference, or one or more of their dependencies is not registered properly.

If you know which component it is you can use regsvr32.exe to register it, just open a command prompt, go to the directory where the component is and type regsvr32 filename.dll (assuming it's a dll), if it works, try to run the code again otherwise come back here with the error.

If you don't know which component it is, try re-installing/repairing the GIS software (I assume you've installed some GIS software that includes the component you're trying to use).