loading VHPI library on irun

I think we need to see more information. What does your irun command line look like? What was the error message in the log file? Do you have a bootstrap routine to register your vhpi procedures?

Thanks, your reply. The irun command is 'irun -unbuff -loadvhpi vhpi_lib_ncsim:initialise -r snapshot'. The problem is I don't see any error messages from irun, also no messages regarding vhpi. When I use ncsim I could see some initialization messages and error messages if I set wrong vhpi information. They don't appear in irun.

Thanks

We've still got next to nothing to go on. My guess would be that, since you are reusing an existing snapshot, you'll need to make sure that all the command-line options on irun that can affect where or how that snapshot is loaded will need to exactly repeat those used when the snapshot was first created.

I've seen problems where things like -libdirname had to be repeated when a snapshot is rerun. Maybe the same is true for loading VHPI libraries.

Beyond that, I personally don't have much to offer.

What Yong didn't tell us was that he's using irun in 3 steps (irun -copile; irun -elaborate; irun -r).

He was passing -loadvhpi only to the final stage (irun -r), but it looks as though the problem was solved by adding -loadvhpi to the elaboration stage as well.

In general I'd recommend to be consistent about passig the same set of args to irun at each stage. More specifically I'd recommend not try to force irun to work like the old-fashioned 3-step ncvlog/ncelab/ncsim flow.

Yong, if I missed anything from our email exchanges, please would you share this with the forum so others can benefit from it?

Thanks, StephenH

 Actually I was investigating something before posting because I was not using '-elaborate' option. I thought it's logically elaboration stage but in fact it compiles and elaborates the top-level testbench with '-top' and '-c' although there are some compilation stages for a number of IPs as libraries. I put '-loadvhpi' option in the stage of elaboration happening and it works with running simulation with the same '-loadvhpi' and '-r'.

 I am trying to really separate the stages with -elaborate option for just personal interest but I have not made it working. :-) Maybe I can add some more info if I find any interesting.

Thanks a lot for your help, guys