Trying to fix a run time error - it said $sqrt1_2_res was undefined. I have now defined sqrt1_2_res, I hope it works. Full message below.

te1=  -6811.991
pixels=           1 by           1
-1.1444092E-04 -1.1444092E-04
initial
-6522.550       151.5517       137.8898      -6811.991       968.8900
i, chi2_gr, chi2_vk, te1, temperature
forrtl: severe (193): Run-Time Check Failure. The variable
'fem_mod_mp_fem_update_$SQRT1_2_RES' is being used without being defined