Dear all, My apologies for mismanaging my complex project. I found a little Makefile in one of the subdirectories that called for g95 and caused the conflict and the declaration that the module was not a GFORTRAN module. It works fine and -I does the job. My apologies. I hope I did not inconvenience you too much, thanks a lot for the support (that you always kindly give me, fortunately this time I found my problem first). Lorenzo