Problem with surface monitoring
 

I've got a problem with monitoring of a large number of surface monitoring points. The matter is that I need to monitor temperature in 160 points with the time, but Fluent doesn't allow me set up more than 30 points in solve\monitor\surface\surface-monitors... After I defined 40 points and then press Ok, error messsage appeared "31-st monitor point is incompleted" and all the monitors after 30-th are blanked with grey color. Please help!