Why femm sometimes never finised the calculation ?

["matthewc_98" <matthewc_98@xxxxxxxxx>]

Hi All,

I have used femm ver. 3.1 for one month. I would like to 
thank Dave, because this is a great sofware. There is one question
needed to have your advice. I used femm to simulate the solenoids. 
In some types of solenoids, it works very well, but in other types 
of solenoids, it never ending the calculation.Even I used different 
mesh densities; it still didn't work. Can you help me to answer this 
question? Thank you so much.

Best Regards,

Matthew