Wilbert Weijer wrote: > > PRINT '(A,I,2A)', 'Error on line ', line, ' in file ', file > 1 > Error: Nonnegative width required in format string at (1) > ************************** I format requires a width for standard conformance, and gfortran requires conformance here. Anyway, if a compiler makes its own choices, your format will change from one to the next. > > Also, the ifort compile (for which the library is tested) uses the -i4 > option, but I can't find a comparable option in gfortran. I assume that > 4 bit is the default, Yes > > warning: format '%ld' expects type 'long int', but argument 3 has type > 'int32' > That's a C format. It may well pose a problem on a 64-bit system, but it's not Fortran.