[RESOLVED] COM problems

[tr333]

JiwaInventory.clsInventory inventory = new JiwaInventory.clsInventoryClass();

JiwaInventory is a COM dll.
the code generates the following error: "Retrieving the COM class factory for component with CLSID {7DCA24D5-2378-400F-875A-6B9DDF7610E2} failed due to the following error: 80040154."

can anyone tell me what the error means (or where i could find out)? i have no documentation for the COM object.

[RobDog888]

Not too sure about your specifics but I found some hits on msdn that may help -
http://search.microsoft.com/results....-US&q=80040154

[tr333]

thanks for the help, but couldn't find anything useful.

where would i find out what error 80040154 means?

[jmcilhinney]

According to a forum post from one of the results of Rob's search, that error code means "class not registered". I can't vouch for the verisimilitude of that information though.

(Always wanted to use that word. Any Star Trek: Voyager fans may recall Tuvok having used it once... or they may have a life.)

[tr333]

According to a forum post from one of the results of Rob's search, that error code means "class not registered". I can't vouch for the verisimilitude of that information though.

(Always wanted to use that word. Any Star Trek: Voyager fans may recall Tuvok having used it once... or they may have a life.)

i tried running "regsvr32 Interop.JiwaInventory.dll", but it gave the error "Interop.JiwaInventory.dll was loaded, but the DllRegisterServer entry point was not found. This file cannot be registered."

[jmcilhinney]

That is a .NET assembly. You don't register .NET assemblies. You need to register the COM library that that assembly is designed to allow you to INTEROPerate with.

[tr333]

i tried registering the COM library associated with the .NET assembly but i got the same error.

where can i find a list of all COM objects that have been registered with windows?

[jmcilhinney]

I have limited knowledge when it comes to COM. You now know what I (think I) know. I'll leave you at the mercy of others from here.

[RobDog888]

Usually you can find out what the variaous meanings of the error code is by searching MS like I did.

Here are 7 more hits at MS.

[tr333]

thanks for the help on this...

it seems like the error code means the class is not registered (as posted by jm), but when i register the class with regsvr32 the same error appears.

[RobDog888]

Yes, but I think John posted in #6 about this. Maybe he can elaborate?

[tr333]

problem solved!

i removed the reference to the interop dll and added a reference to the COM dll, so VS would create a new interop dll.

must have been a problem somewhere in the old interop dll.