[mesa-users] MLT problem

[Kenny Van]

Hi everyone,

So I've run into some issues with the code breaking. From the output of the
error it seems like the issue occurs in the mlt.f90 file in the private
directory inside of MLT. I have been trying to diagnose the problem myself
and I've run into a bit of a wall. Looking at the error output I think the
output is either in how the calculation is done for dA_dvb, which produces
NaN. This error then propagates to d_Bcubed_dvb which is calculated using
dA_dvb. If I understand the theory correctly, the A value, a0, diff_grads
are all non negative values. The other place where this may be going wrong
is with the d_diff_grads_dvb value. While I have some intuition on the
diff_grads value, I'm not sure if d_diff_grads_dvb can be negative.
Hopefully someone has some insight on what I can do to try and fix this
error.


                               d_Bcubed_dvb(mlt_dgrada)
  NaN
                           d_diff_grads_dvb(mlt_dgrada)
-1.0000000000000000D+00
                                     dA_dvb(mlt_dgrada)
  NaN


Thanks
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