> FORTRAN STOP NN created a new CASE.STRUCT_NN FILE > 0.440u 0.000s 0:00.44 100.0% 0+0k 0+0io 97pf+0w > > How to solve the problem?Please help me.Thank you. This is normal. Do as the program suggests, and copy the newly created case.struct_nn to case.struct, and start again (you might need to repeat this a few times). Stefaan