Optimized design "vopt_tb" cannot be used by this version

[cyberbemon]

I'm currently going through the training materials and I can't seem to run the hello world example. I get the following error message.

# Start time: 16:23:39 on Apr 21,2021
# ** Error: (vsim-3816) Optimized design "vopt_tb" cannot be used by this version of the simulator - it was only compiled for a 32-bit version of vsim
# Error loading design
Error loading design
# End time: 16:23:39 on Apr 21,2021, Elapsed time: 0:00:00
# Errors: 1, Warnings: 0

I tried modifying the command to use vsim -32 instead of vsim -64 But that made things much worse and gave more errors. So I've reverted it back to normal.  My vsim version is as follows.

Model Technology ModelSim SE vsim 10.7d Simulator 2019.02 Feb 15 2019

Is this supported with Pulp? or should I be trying to run this on a different Sim?

[kgf]

There are a couple of independent problems here.

- It seems like you used vopt (which is one part of compilation process you have done) using a 32bit version and then are trying to start the simulator (vsim) using a 64bit version. At least the error suggests that. This should be on your end, not an issue on the PULP part.

- Technically we use Questasim and not Modelsim. The difference is a bit academic, but basically Questasim has a 'newer' architecture and supports some of the SV features like assertions better. I am not 100% sure if we have anything in the PULP sources that would break compatibility, my gut feeling is that either should work fine.

- 10.7 is a rather old version, it could be that the default version is still 32bit.. So when you do not state something it could be that vopt runs with32bit..

- What could also be that you have a system where multiple versions are installed on top of each other. so vopt is executed from a path from an older installation and this causes issues (this is just a wild guess).

[cyberbemon]

There are a couple of independent problems here.

- It seems like you used vopt (which is one part of compilation process you have done) using a 32bit version and then are trying to start the simulator (vsim) using a 64bit version. At least the error suggests that. This should be on your end, not an issue on the PULP part.

Thanks, that was the issue. I had one too many environment variables that pointed to 2 different versions of modelsim. I changed them to point to the correct version and I can get things to compile.