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COM error

Posted on 2001-06-26
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Last Modified: 2010-04-06
Hi, we built a delphi COM components and I got this error on runtime:
"cannot debug project unless a host application is defined. Use the Run|Parameters..dialog box"

Thanks
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Question by:mohbb22
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Expert Comment

by:Epsylon
ID: 6227408
This is normal. You just can't run a COM object/dll.
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Author Comment

by:mohbb22
ID: 6227528
can the error be because I checked the Include Type Library Box when creating the COM object?
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Epsylon earned 300 total points
ID: 6227560
No. Check your project directory. You will probably find a DLL there. This DLL is the result of the compilation of your project.

When you compile (F9) a 'normal' application, an EXE is created. When done Delphi automatically runs the EXE. This works fine. But when you compile (F9) a DLL, Delphi tries to run the DLL. That results in the "cannot debug project unless a host application is defined. Use the Run|Parameters..dialog box" message.
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Author Comment

by:mohbb22
ID: 6227663
I think you didn't understand me well...I built a COM Object and I used in in another application. (ie. I didn't compile the DLL itself). During compilation this application works fine but I RUn it I ge the error.

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Author Comment

by:mohbb22
ID: 6227670
I think you didn't understand me well...I built a COM Object and I used in in another application. (ie. I didn't compile the DLL itself). During compilation this application works fine but I RUn it I ge the error.

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Author Comment

by:mohbb22
ID: 6227677
I think you didn't understand me well...I built a COM Object and I used in in another application. (ie. I didn't compile the DLL itself). During compilation this application works fine but I RUn it I ge the error.

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LVL 13

Expert Comment

by:Epsylon
ID: 6227831
That message means that Delphi can't run the compiled application. Nothing more.

So what kind of project is it?
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Author Comment

by:mohbb22
ID: 6231064
It's a COM project..we are trying to build a COM Component .
Right now we are facing another error of:
Project RSATesting.exe raised exception class EAccessViolation with message 'Access Violation at address 00447847' in module 'RSATesting.exe' . Write of address '0000000' . Process stoped. Use Step or Run to continue.

note: TRSATesting is the application using the COM we built.(the COM is an RSA algorithm program)
Note: also that we are not using any pointers.
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