I found this page because I encountered a different problem in a similar process. As a standard practice I always work on Ansys stand-alone programs, and I was trying to export my Fluent solution (version 19.2) through file--> export to CFD post. The problem is that I cannot select the Interior Zone Surfaces (the area is greyed out) and after selecting the variables and pressing "write" I get the following message:
Error: GENERAL-CAR-CDR: invalid argument : improper list
Error Object: global
EDIT: I also tried exporting the data in other formats (e.g. EnSight Case Gold) and it works
Do you have any idea why this might happen?
Thank you in advance for your support!