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Editorial Team
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Editorial Team
Asked: May 15, 20262026-05-15T10:36:30+00:00 2026-05-15T10:36:30+00:00

I got the following error in Delphi 2007. What does it mean? [DCC Error]

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I got the following error in Delphi 2007. What does it mean?

[DCC Error] uMyUnit.pas(9614): F2084 Internal Error: AV21B66E31-R0000000F-0

I did some recently added code removing, line insertions/deletions, changing compiler options, but nothing worked.

I was able to solve this by switching the ‘Typed pointer @ operation’ option off. Interestingly, that it was working with this option switched on. But after I added some code which doesn’t even had pointers it broke.

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  1. Editorial Team
    Editorial Team
    2026-05-15T10:36:30+00:00Added an answer on May 15, 2026 at 10:36 am

    It’s a condensed-down version of an error that’s pretty familiar to any Delphi developer. If you saw it in the IDE, it would say something like:

    Access Violation at location 21B66E31:
    Read of address 00000000.

    It means that your code, as currently written, has managed to expose a bug in the compiler. Unfortunately, the only thing to do about it, since the source for the compiler isn’t available, is keep doing more of what you’ve already tried that hasn’t worked so far.

    Or try updating to D2010 and see if it works better. They fixed a lot of internal compiler errors in Delphi 2010. (Granted, a lot of them were new errors introduced in Delphi 2009, but some of them weren’t.)

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