Hi, Ruben.
I also know almost nothing about SOWFA, but the error about the random seed in HydroCalc.f90 is something we resolved in FAST v7.02.00. There are a couple of forum posts that may help you with that error: * [url]Compiling FAST under Linux with gfortran - #4 by Bonnie.Jonkman] (see my Tue Nov 08, 2011 post)