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Newcomers DBPro Corner / 100% machine code with Line Numbers?

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MatriX
21
Years of Service
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Joined: 19th Oct 2003
Location: Deer Park, New York
Posted: 11th Sep 2006 10:17
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I asked a question a long time ago and I'm still not clear on it really.

If DBPro creates 100% machine code - how is it that a runtime error returns a line number error?

For example - "Runtime Error 506 - Could Not Load Image at line 200"

How does it know what line number the error was at after it was compiled into machine code?

Thank you TGC for creating such amazing products!

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IanM
Retired Moderator
22
Years of Service
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Joined: 11th Sep 2002
Location: In my moon base
Posted: 11th Sep 2006 23:02
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It's easy.

The code checks to see if an error occurred by simply checking if a certain memory location contains a non-zero value. If it does, the code moves the line number into another memory location and then jumps to the error-recovery code to end the program. Finally, the program uses the error number stored in the error memory location as a lookup into a table containing the error string.

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