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Altera_Forum's avatar
Altera_Forum
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10 years ago

vhdl file syntax or logic error result in that ...unable open .vcd

Hi, I am new to Quartus II. I have created a very simple program for shift register in VHDL. It was successfully compiled. Then I create the input wave forms and saved it. When I run it, the la...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

hope qsim directory in file path indicates that you use Universtity Progrma VWF <- is it true?

The first error i've met today face to face: after several succesive runs for functional simualtion and when I've chaged synthesis option i 've started encounter error in vt files, no any changes except for synthesis. even i try to recreate vt file.

Try simulate in ModelSim-Altera Starter. And it is not easy provide answer when you say "Quartus II" and what simulation tool you've used. What is version number?