To check on one more thing related to that error. Do you have full IBIS-AMI Tx models or are they non-AMI traditional IBIS models.
Also, for AMI sims, I usually don't like to use the "import single component" as it makes it harded to do the pairing step required for AMI siulations with multiple Tx/Rx models. That is the electrically connected Tx/Rx pairs need to be flagged as such, but control clicking to highlight the matched Tx/Rx model and select "pair AMI Tx/Rx". With the single component import, we can't pair at a symbol level, so those associations have to be set in the component properties, and that is a bit messier.
You are navigating away from the AIS Discovery experience