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COM Callable Library Problem
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QAIX > .Net Development > COM Callable Library Problem 29 January 2008 13:33:05
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COM Callable Library Problem

Brady Kelly 29 January 2008 13:33:05
 I've just created a COM Callable C# class library, registered with the
Register for COM Interop option, just for testing. Then I'm using some VBA
code to instantiate the object and call it's only method. When I run the
code below, I get an "Object reference not set to an instance of an object."
error, but my object isn't Nothing.



I suspect the interop to be the problem. Has anyone encountered anything
like this before?



Set pdGen = New PdfGenerator.PdfGen­erator <My C# class>

ret = pdGen.GeneratePdf(x­mlPath, conn)


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Daniel Petersson 29 January 2008 13:33:05 [ permanent link ]
 if pdGen isn't null then it quite likely that some internal code in your PdfGenerator fails.

attach a debugger and set it to "break on throw" exceptions.
( or simply check the StackTrace of the thrown exception )

regards,
Daniel
___________________­____________________­_
From: Discussion of development on the .NET platform using any managed language [DOTNET-CLR@DISCUSS.DEVELOP.COM] On Behalf Of Brady Kelly [brady@CHASESOFTWARE.CO.ZA]
Sent: Monday, January 28, 2008 4:01 PM
To: DOTNET-CLR@DISCUSS.­DEVELOP.COM
Subject: [DOTNET-CLR] COM Callable Library Problem

I've just created a COM Callable C# class library, registered with the
Register for COM Interop option, just for testing. Then I'm using some VBA
code to instantiate the object and call it's only method. When I run the
code below, I get an "Object reference not set to an instance of an object."
error, but my object isn't Nothing.



I suspect the interop to be the problem. Has anyone encountered anything
like this before?



Set pdGen = New PdfGenerator.PdfGen­erator <My C# class>

ret = pdGen.GeneratePdf(x­mlPath, conn)


===================­================
This list is hosted by DevelopMentor? http://www.develop.­com

View archives and manage your subscription(s) at http://discuss.deve­lop.com

===================­================
This list is hosted by DevelopMentor http://www.develop.­com

View archives and manage your subscription(s) at http://discuss.deve­lop.com

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QAIX > .Net Development > COM Callable Library Problem 29 January 2008 13:33:05
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