Nikolai Zhubr wrote: > Now, I'm starting to suspect that negative TotalAllocated values just > result from doing deallocations in a different thread, which is what my > programm actually does all the time. I'll go to make a small test. Maybe it's related to (or the same as) bug 14315? http://bugs.freepascal.org/view.php?id=14315 Micha