QuartusII internal error

Hi everyone,[/B]

[/B]

I compile a code in QuartusII and during the last task (EDA Netlist Writer) this error occur:

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Internal Error: Sub-system: WSC, File: /quartus/neto/wsc/wsc_port.cpp, Line: 514

m_port_info.num_of_dimensions() == 1

Stack Trace:

0x251D8 : WSC_PORT::bus_member_index + 0x88 (NETO_WSC)

End-trace

Quartus II Version 8.1 Build 163 10/28/2008 SJ Web Edition

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It's this error occur because of my QuartusII cannot support the compilation? Can anyone help me please..http://www.edaboard.com/images/smilies/icon_sad.gif

Many thanks