描述

General Description: 

When simulating Dual Port Block Memory v6.3, targeting the Virtex-4 family and using NCSIM LDV 5.1 simulator, I receive the following ERROR message: 

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ncsim> run 

ASSERT/ERROR (time 1400 NS) from process :compare_output1 (architecture work.testbench:xilinx) 

VHDL ( 01 ) /= Netlist ( 11 ) on DOUTA 

Assertion at 1400 NS + 1 

./svg_tb_blkmemdp_v6_3.vhd:1583 ASSERT doutavhdl = doutanetlist 

ncsim> exit 

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解决方案

This issue occurs when you target the Virtex-4 family, with the SDF file, and use NCSIM. 

It does not occur with the Virtex-II family or when you run the simulation without the SDF file. 

This issue is still under investigation. If you encounter this issue and need assistance, please, contact Xilinx technical support.