Why does it say trhis?

apmplanner2.exe caused an Access Violation at location 6AA99720 in module Qt5Core.dll Reading from location 0000004E.

Registers:
eax=00000000 ebx=08aa5660 ecx=0000000f edx=00008000 esi=0000001e edi=0000000f
eip=6aa99720 esp=0c0afda0 ebp=08aa5660 iopl=0 nv up ei pl nz na po nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206

AddrPC Params
6AA99720 0C0AFE34 08AA567C 0C0AFE54 Qt5Core.dll!public: static void __cdecl QMetaObject::activate(class QObject *,int,int,void * *)
76F9B4A9 01700000 00000000 0C0AFE44 ntdll.dll!RtlFreeHeap
6AD8ECFA 08AA5660 00000005 0000000A MSVCR120.dll!free
6AA99DAE 08AA5660 00C61320 0000000A Qt5Core.dll!public: static void __cdecl QMetaObject::activate(class QObject *,struct QMetaObject const *,int,void * *)
0067A31E 08C9CF48 160A2CF0 0897FCE0 apmplanner2.exe

What OS version, APM Planner 2.0 version?