Borland C++ Builder 6 Pro forgets lines?

[Benoit]

I seem to be having some weird issue... this has been going on for
quite a while but never was able to figure it out.

When I compile and run my application in debug mode, a blue dot
appears next to each line of code of which I can click the to add a
breakpoint in my code.

But for whatever reason, on some occasions, some very normal lines are
not take into account and I think they're not even executed as they
don't have a blue dot next to them nor can I put a breakpoint next to.

I tried deleting the OBJ files (although I don't really know what they
do exactly) and I tried moving the line somewhere else but then some
other line is not taken into account. I tried doing a fresh COMPILE,
MAKE and BUILD and has no effect. Restarting Borland doesn't seem to
work either.

Does anyone have any idea?

Thanks,

Benoit