Is that the exact message? I searched the Panorama X source code for there is no such and couldn’t find it.
What command are you using? Are you trying to create a new database with a csv file, or import the csv file into an existing database?
If the former, I would suggest using File>Import>New Database From Text File or File>New>New Database From Text File (these are actually the same command).
You can also just drag the text file onto the Panorama icon, though if you do that it won’t set up the field names from the first line of the data.
To import into an existing file, use the Text Import wizard: