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Altera_Forum
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11 years ago

Internal Error: Sub-system: OPT, File: /quartus/synth/opt/opt_ram.cpp, Line: 8319

Hi,

I coded a dual port ram and while synthesising it, quartus 2 is showing the following message in a dialog:

Internal Error: Sub-system: OPT, File: /quartus/synth/opt/opt_ram.cpp, Line: 8319

this->m_read_a_during_write_b_behavior == CDB_RAM_READ_OLD_DATA

Stack Trace:

0x98C32 : opt_sea_of_mux + 0x289F2 (SYNTH_OPT)

0xB8226 : MLS_SCRIPT_MANAGER::~MLS_SCRIPT_MANAGER + 0xBAF6 (SYNTH_OPT)

0x97E4E : opt_sea_of_mux + 0x27C0E (SYNTH_OPT)

0x9701C : opt_sea_of_mux + 0x26DDC (SYNTH_OPT)

0x96CDE : opt_sea_of_mux + 0x26A9E (SYNTH_OPT)

End-trace

Quartus II Version 9.0 Build 235 06/17/2009 SJ Web Edition

Service Pack Installed: 2

please note that i ve connected all ports of the ram....

please help...

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    How did you connect it? from a megawizard file? in a BDF?

    This is a Q2 crash - first of all try deleting the /db/ and /incremental_db/ folders and try recompiling. If that fails - can you try a newer version (9.0 is 5 years old).