Program abort, when break is set

Hi,

in my D5.0 (comp. 5.62,  Win98 comp. 4.10.98) app I use a TControl panel
with TTabSheets on it.
If I enter one of the TabSheets, the OnShow event is executed.

If I set a breakpoint in that event proc, the whole app aborts in that way,
that I only can restart my PC, often only cold start is possible.

Removing the breakpoint from that place, everything works fine.

Anything known about that ?

Doris