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Calling Com Server from Corba object

blitz051697 asked
Last Modified: 2010-04-04
I am running into a problem calling out to a COM server from within a corba object.  Everytime I make the following call....

        oComServer := CoComServerTest.Create;

I get an error message stating that "CoInitialize Has not been called".  I realize that CoInitialize needs to be called on each thread before COM can be used but The Corba server is setup as single threaded.  What is going on?  If I make the same exact call from a regular client then all works fine.  

I have sample programs that I have been playing with.  If you send me your email address to Randy_Michak@usiva.com I can forward the code.  It is a little much to paste here though.
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Hi blitz,

I don't know much about COM servers, but maybe these articles will help :

part I


part II&III (links see article part I)


Please send to epsylon3@hotmail.com

Have you tried creating your COM object using variants?

  vCOM_Obj : Variant;
  vCOM_Obj := CreateOLEObject('ErrEvntLog.ErrEvntLogging');
  IF NOT(VarIsEmpty)
    //Do whatever you need to do

Just make sure that you have the ComServ object in your USES clause

Just a suggestion

The Neil
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That seemed to work.  THe only question that I have is that since this is a single threaded Corba Object I shouldn't have to all the CoInitialize() more than once.  I would think that if I call CoInitialize on the main thread it would work.  It doesn't appear to be the case though.  Even though the Corba Object is single threaded it must be on an entirely different thread than the main program.

One call for one CreateCOMObject should be enough...

Hmmm, so can can't just CoInitialize before you create the COMObject? You have it working with a special thread for this statement? I'm not sure I totally understand what you explain.

You put a lot of points on this question, I wouldn't mind to look in your code, I only have no experience with Corba, might be interesting because of that... If you like me to look into it, you can mail me at florisb@euronet.nl, will be in the weekend then (almost evening here now).

Going home now, nice weekend!




your welcome,

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