Resolving CAD: Invalid Argument Error

How to resolve Error: CAD: invalid argument [1]: wrong type [not a pair]

Some of the reasons which could cause this message are changes in the monitors.

If the user changes any feature during the analysis when he continues running, the message could appear.

To solve this error, the correct way to do that is saving the simulation. After that we could open the cas file and make the changes that we want to introduce for the next steps. We load the dat file matched with the cas and saved previously and run again.

This error also means that there's a blank field somewhere, i.e. something is missing from the set-up. Check the remainder of the panel, there is a slight chance that you have turned something on/off in the set-up earlier and corrupted a value call in the GUI. See if turning some of the options on/off clears the issue.

The changed settings report, Input Summary > List Changes, can help if you look for empty fields.