Full Compilation was cancelled due to an error (10 warnings)

Hi,

I am new to Quartus II and have just started compiling some code today, unfortunately I get the following message which is followed by the message written in the subject line.

"Internal Error: Sub-system: MTM, File: /quartus/synth/mtm/mtm_netlist_cleanup.cpp, Line: 1466

(aoterm != 0) && (aoterm->is_used_as(DB_PARALLEL_EXPANDER_OUT))

Stack Trace:

0x4236C : MTM_ROOT::start + 0x3E30C (synth_mtm)

0x47DB2 : MTM_ROOT::start + 0x43D52 (synth_mtm)

0x489AC : MTM_ROOT::start + 0x4494C (synth_mtm)

0x41F17 : MTM_ROOT::start + 0x3DEB7 (synth_mtm)

End-trace

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

Service Pack Installed: 2"

Can anyone please help me identify what this problem is and how it can be fixed?

Many thanks,

Shaquille