Hello all,

I have never used the field source monitor in CST, I am doing so in a PIC simulation of a magnetron. There is not much information on these monitors in the help docs, so it has been a lot of trial and error. I have fixed most of the errors, the only warning I get now is:

WARNING: Encountered field source monitor definition(s) with sources outside. Please check your setup.
 

After the sim runs, I see an .ffm file of the field source monitor's name that is thousands of KB. However, the .fsm file I need to use for other simulations never appears to be completed as it is only ever 1 KB. My question is; has anyone else encountered this issue with the .fsm file seemingly never properly written? If so, was it a post-processing error, or something with the monitor setup?
Edu CST Studio