I have modified TStrings.SetdelimitedText to ignore spaces as delimiters (to emulate StrictDelimiter := True in later versions of Delphi). This has worked for years.
Now suddenly this has stopped working correctly. When I try to debug into the (modified) Classes.pas file in C:\Program Files\Borland\Delphi6\Source\Rtl\Common, Delphi 6 now does not show any breakpoint locations in the Classes.pas file and any breakpoints are shown as green (disabled).
I have deleted all classes.dcu and there seems to be no new classes.dcu created on rebuild???
Any ideas what is going on and how can I re-enable this and ensure that the correct modified code is being used.