I would also like to add that I believe the comment in this post about the bindings shipping with preCICE being F77 compliant is incorrect. If I call any of the precicef functions while not using the module interface where a name length or other value is expected to be passed by value this can cause problems. Without the module fortran is going to pass the memory reference for the value which is not compatible as a filename of length 17 might be seen as length 67893245 due to the value “17” being passed as the memory address no the length value.