Unclassifiable statement


I defined subroutine melt_fraction, then compiled it and I didn’t get any error. However, when I include MODULE melt_fraction_mod before it, I am getting the following error " SUBROUTINE melt_fraction(IJK)
Error: Unclassifiable statement at (1)"

Can you advice me to solve it? Am I defining it correctly?

1dheatconduction_2022-06-11T165405.010860.zip (331.3 KB)

Add the single line contains between the Module and Subroutine defintions, like so:

MODULE melt_fraction_mod

   SUBROUTINE melt_fraction(IJK)