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Asked: 2026-05-15T11:04:46+00:00

HI: I’ve a Delphi 7 program that I wrote many years ago, but I’ve

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HI:

I’ve a Delphi 7 program that I wrote many years ago, but I’ve lost the source code. It’s a small program but very useful for me.

I’ve tried to ‘install’ it again in a new Windows XP computer, just copying the folder with de data (.db paradox files), and configured the BDE connection.

When the programm starts I receive an “Unknown exception” and halts. I’ve no idea why this happens, and can’t debug cause the lost source code. I’ve tried in another computer with the same results.

Any suggestions or ideas? What do you do in a situation like this?

Thanks in advance.

EDIT:
When I installed Delphi 7 in the new XP computer, the exception came from unknown to known. It was something related to the folder for the Paradox.net file. Thnk you all.

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1 Answer

  1. Editorial Team

    Delphi IDE can attach to a running process and debug it (Run -> Attach to process), although without debug symbols you will end up debugging plain assembler code, which requires some knowledge of assembler and how a Windows application works. And debugging startup exceptions could be pretty difficult if the debugger can’t start the program. You can also use the WinDbg debugger from Microsoft.
    There are disassemblers (I used the very powerful IDA Pro) that are able to recognize standard library calls helping analysys a lot. You may also find decompilers, although decompiling native applications is a bit more difficult than with those using a p-code or the like.
    If the error is not due to a misconfiguration, patching a binary file is not easy.

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