MAMEWorld Forums - Programming - -debug option not woriking

I tried to run the MAME Debugger, but it crashes.
Here's what happens:

C:\_PARDUZ_\_APPS_\MameMess 64>mame64 sq1 -log -debug ----------------------------------------------------- Exception at EIP=00000000025D1EE1 (debug_view_disasm::view_update()+0x0041): ACCESS VIOLATION While attempting to read memory at 0000000000000010 ----------------------------------------------------- RAX=0000000000000000 RBX=0000000000000000 RCX=000000000AC119E0 RDX=00000000FFFFFFFF RSI=0000000012ACD510 RDI=7FFFFFFFFFFFFFFF RBP=0000000000229E20 RSP=0000000000229DA0 R8=0000000000000320 R9=0000000000000050 R10=0000000000000014 R11=0000000000229CEC R12=00000000121B27B0 R13=00000000120262A0 R14=00000000775536F4 R15=0000000000000000 ----------------------------------------------------- Stack crawl: 0000000000229DA0: 00000000025D1EE1 (debug_view_disasm::view_update()+0x0041) 0000000000229EA0: 00000000025CF063 (debug_view::set_source(debug_view_source const&)+0x0093) 0000000000229F00: 000000000151BCED (debugview_info::maxwidth()+0x004d) 000000000022A0B0: 000000000151A76E (consolewin_info::consolewin_info(debugger_windows_interface&)+0x025e) 000000000022A130: 00000000014FE3F0 (debugger_windows::wait_for_debugger(device_t&, bool)+0x01b0) 000000000022A160: 00000000014F73D9 (osd_common_t::wait_for_debugger(device_t&, bool)+0x0019) 000000000022A1E0: 00000000025CD749 (device_debug::instruction_hook(unsigned int)+0x0289) 000000000022A2A0: 0000000001C0C572 (m68000_base_device::execute_run()+0x0a02) 000000000022A340: 000000000257B922 (device_scheduler::timeslice()+0x0312) 000000000022A3A0: 000000000253B0F8 (running_machine::run(bool)+0x0148) 000000000022F770: 000000000253609C (machine_manager::execute()+0x01fc) 000000000022F950: 0000000002487599 (cli_frontend::execute(int, char**)+0x0839) 000000000022FDF0: 00000000014F500B (utf8_main(int, char**)+0x016b) 000000000022FE50: 000000000297311E (wmain+0x007e) 000000000022FF20: 000000000040140C (__tmainCRTStartup+0x025c) 000000000022FF50: 000000000040153B (mainCRTStartup+0x001b) 000000000022FF80: 00000000774359CD (BaseThreadInitThunk+0x000d) 000000000022FFD0: 000000007766B981 (RtlUserThreadStart+0x0021) C:\_PARDUZ_\_APPS_\MameMess 64>

From the error.log:
[:esp] Device ':esp' did not register any state to save! [ Clock = 29761 Soft reset

What should i look for? Am I missing some dll for the UI?
-edit-
System is a Win7-64 PRO PC, the command is launched from the CMD window with Admin rights.
The ROM works as expected without the -debug option.

(LOL for the ": pump" emoticon popping out

Edited by Parduz (01/25/16 03:05 PM)