was sagt mir folgende Debuggermeldung genau?

EAP[qw.exe]: HEAP: Free Heap block 17377c8 modified at 17377d8 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 1719a48 modified at 1719a58 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 175a180 modified at 175a190 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 166ec28 modified at 166ec38 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 170bf80 modified at 170bf90 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 37e42e8 modified at 37e42f8 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 37e42e8 modified at 37e432c after it was freed
HEAP[ugraf.exe]: HEAP: Free Heap block 37e5688 modified at 37e56cc after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 37c8628 modified at 37c8638 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 38ea000 modified at 38ea044 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 38e40e0 modified at 38e4124 after it was freed
HEAP[qw.exe]: HEAP: Free Heap block 38b0f78 modified at 38b0fbc after it was freed
Detected memory leaks!
Dumping objects ->
{96} normal block at 0x1F0F27C0, 748 bytes long.
Data: <5-4797-5110-52 > 35 2D 34 37 39 37 2D 35 31 31 30 2D 35 32 00 00
Object dump complete.
Thread 0x640 wurde mit Code 0 (0x0) beendet.

Wo kann ich ansetzen um den Fehler zu finden?

Speicher Freigegeben und ihn DANACH weiterverwendet

Dumping objects ->
{96} normal block at 0x1F0F27C0, 748 bytes long.
Data: <5-4797-5110-52 > 35 2D 34 37 39 37 2D 35 31 31 30 2D 35 32 00 00
Object dump complete.

Speicher wurde allociert aber nie freigegeben