4 Common Migration Issues
(Ask a Question)The following table shows the common migration issues with the causes and solutions.
| Symptom | Cause | Solution |
|---|---|---|
| "Failed to initialize licensing environment" message | License not configured | Set SALT_LICENSE_SERVER (floating) or
LM_LICENSE_FILE (node-locked) |
| Missing signals in waveform | Signals optimized away | Add +acc=rn to vopt or use -voptargs="+acc"
with vsim. |
| Empty hierarchy browser | Debug database not generated | Add -debugdb to vopt command. |
| Wrong simulator launches | PATH contains both tools | Verify PATH order or use explicit installation path. |
| "vopt not found" error message | Using ModelSim command | vopt is QuestaSim-only, use basic vsim flow instead. |