Quartus II Fatal Error: Access Violation at 0X000000000CCC75BB

Hi,

I am always getting this Quartus internal error (see below) when I compile my project (on the step of analysis & synthesis), although no error or critical warning were given. Could anybody tell me a possible reason? Thanks a lot.

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*** Fatal Error: Access Violation at 0X000000000CCC75BB

Module: quartus_map.exe

Lock in use: 9

Stack Trace:

0x175ba: SSC_UTIL:: perform_timing_analysis + 0x6bfa (TSM_SSC)

0x19532: SSC_UTIL:: perform_timing_analysis + 0x8b72 (TSM_SSC)

0xba99: SSC_UTIL::build_tdb_netlist + 0x2a9 (TSM_SSC)

0xd3ff: SSC_UTIL::initialize_netlist + 0x10f (TSM_SSC)

0x73bb7: sutil_write_flattened_tdb_netlist + 0xe7 (SYNTH_SUTIL)

0x403b8: sgn_qic_helper + 0x2f618 (synth_sgn)

0x10b88: sgn_qic_full + 0x198 (synth_sgn)

0x1297b: qexe_get_tcl_sub_option + 0x1f2b (comp_qexe)

0x15bad: qexe_process_cmdline_arguments + 0x5ad (comp_qexe)

0x15cc1: qexe_standard_main + 0xa1 (comp_qexe)

0x17b8: MSG_INITIALIZER::~MSG_INITIALIZER + 0x118 (CCL_MSG)

0x175c: MSG_INITIALIZER::~MSG_INITIALIZER + 0xbc (CCL_MSG)

0x3c04: MEM_SEGMENT_INTERNAL::free_interthread_delete_queue + 0x94 (ccl_mem)

0x2d20f: msg_exe_main + 0x8f (CCL_MSG)

0x1652c: BaseThreadInitThunk + 0xc (kernel32)

0x2c520: RtlUserThreadStart + 0x20 (ntdll)

End-trace

Quartus II 64-Bit Version 12.0 Build 178 05/31/2012 SJ Full Version

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cheers,

B.H.