A code that had been written for a new material model, previously worked in the old version.
The codes has been modified to the new version and also the input files has been updated.
I got an error, I don't understand why, the code was only modified for the new version?
Is there a problem in the input file? Do I need to do some debugging? If I should do debugging, do I need special files for that? are there guidelines for how to do debugging?
This is the error message I get:
mdl> c
Solve: from time 0 to 0.0500003
A 'nan' (not a number) value was found
Possible operations that can cause 'nan':
acos(x) where x > 1. or x < -1.
log(x) where x <= 0.
sqrt(x) where x < 0.
pow(x,y) where x<0 and y is not an integer
Error at node 1906
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[code][/code]