Internal Error in Quartus II 13.1

[Altera_Forum]

Hi, 

 I am using Quartus II 13.1 in XP 64 and when I try to compile my design I have this error :  Internal Error: Sub-system: VRFX, File: /quartus/synth/vrfx/verific/database/net.cpp, Line: 2541 tmp Stack Trace:   0xb51ab: VRFX_ELABORATOR::elaborate + 0x5ba9b   0xb4e90: VRFX_ELABORATOR::elaborate + 0x5b780   0xaaa08: VRFX_ELABORATOR::elaborate + 0x512f8   0xab1a5: VRFX_ELABORATOR::elaborate + 0x51a95   0x190222: VRFX_ELABORATOR::operator= + 0x80932   0x1908bc: VRFX_ELABORATOR::operator= + 0x80fcc   0x60316: VRFX_ELABORATOR::elaborate + 0x6c06   0x598fc: VRFX_ELABORATOR::elaborate + 0x1ec   0xd6f93: sgn_clear_check_ip_functor + 0x3a323   0xdac3f: sgn_clear_check_ip_functor + 0x3dfcf   0xdc525: sgn_clear_check_ip_functor + 0x3f8b5   0xa57d4: sgn_clear_check_ip_functor + 0x8b64   0xb5efc: sgn_clear_check_ip_functor + 0x1928c   0xb286a: sgn_clear_check_ip_functor + 0x15bfa   0xb5f4c: sgn_clear_check_ip_functor + 0x192dc   0xb286a: sgn_clear_check_ip_functor + 0x15bfa   0xb5f4c: sgn_clear_check_ip_functor + 0x192dc   0xba0dd: sgn_clear_check_ip_functor + 0x1d46d   0x10de2: sgn_qic_full + 0x152      0x128ed: qexe_get_command_line + 0x206d   0x1573e: qexe_process_cmdline_arguments + 0x59e   0x15851: qexe_standard_main + 0xa1    0xa7f8: msg_exe_fini + 0x58   0xaf3c: msg_exe_fini + 0x79c   0x1f14: MEM_SEGMENT_INTERNAL::~MEM_SEGMENT_INTERNAL + 0x194   0xb8bf: msg_exe_main + 0x8f    0x1969b: BaseProcessStart + 0x2b   End-trace  Quartus II 64-Bit Version 13.1.0 Build 162 10/23/2013 SJ Full Version   Does anyone can help me please?   Nicolas

[Altera_Forum]

Hi, you can delete the "db" subdir of your project. It often helps.

[Altera_Forum]

I have the solution! 

 It was global signals that I don't exclude from synthesis. I used global signals in my simulation and I forgot to exclude them from synthesis.  But I didn't have error messages during synthesis process. I don't know why...

[Altera_Forum]

You should send this solution in an Altera request.