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NCVerilog cannot dump out waveform

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jiang

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Hi guys,

When I run the gate level simulation, ncverilog cannont dump out waveform.
It shows
"ERROR: ACC VISNOC
Attempting to place a value change callback on top.HCLK which does not have read access.
.\easy_bfm.v, 65: $fsdbDumpvars."
I used $dumpvars to dump waveform, but it did still not work.
I used $monitor to monitor variables and then variables did change their values in time.
Does anyone help me?

Best Regards,
jiang
 

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