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Asked: 2026-05-12T20:46:10+00:00

I am upgrading a project from Delphi 2009 to D2010 and came across the

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I am upgrading a project from Delphi 2009 to D2010 and came across the following Internal Error

[DCC Fatal Error] frm_Test.pas(381):
F2084 Internal Error: C15700

when calling

(ILocalizable(TMyProgram.MainForm.AbilitiesForm)).Localize('c:\test.txt');

Here are the definitions:

ILocalizable = interface
  ['{4DF36053-2651-45DE-ADF7-AEC033937A02}']
  procedure Localize(const FileName: TFileName);
end;

TMyProgram is a helper class similar to the C#’s class Program.
It has aproperty MainForm which points to the main form of the application.
The main form itself has a property poiting to another form which is created and emedded within a panel in the main form.
I am calling the Localize method of the subform.

This source has been compilable with Delphi 2005-9.

Any idea is welcome.

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1 Answer

  1. Editorial Team

    These are bugs in the compiler/linker. You can find many references of these bugs on the internet in different Delphi versions, but they are not always the same bugs. That makes it difficult to give one solution for all those different kind of problems.

    General solutions that might fix it are

    • Remove *.dcp *.dcpil *.dcu *.dcuil *.bpl *.dll
    • Rewrite your code in another way
    • Tinker with compiler options
    • Get the latest Delphi version

    More information can be found here.

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