Possible to have <10 surface monitors?
 

I'm trying to monitor static pressure on a surface at 19 different points. I have defined these points and set up the first ten monitors without problem. However, each time I define more than ten I get the following message:
"Error: Monitor <name> has not been completely defined.
Error: Object: #f"

I am working on a university computer so the first thing that sprung to my mind was that this ten-monitor limit may be something built into the academic version of the solver.

Any ideas on how I can define all 19 monitors?