Illegal character in statement label field (module statement in .f file)

[psing51]

Hi ,
I am trying to compile a fortran file and i get following error - 

mpiifort -c -O3 -march=core-avx2 -convert big_endian -DLINUX -fp-model precise -assume byterecl   -integer-size 32 -real-size 32 sigio_module.f
sigio_module.f(2): error #5149: Illegal character in statement label field  [m]
module sigio_module
^
sigio_module.f(2): error #5149: Illegal character in statement label field  [o]
module sigio_module
-^
sigio_module.f(2): error #5149: Illegal character in statement label field  [d]
module sigio_module
--^
sigio_module.f(2): error #5149: Illegal character in statement label field  [u]
module sigio_module
---^
sigio_module.f(2): error #5149: Illegal character in statement label field  [l]
module sigio_module
----^
sigio_module.f(2): error #5118: First statement in file must not be continued
module sigio_module
-----^

 
I have attached the file herewith.
Do i need to use any flag to make the compilation work ?

[mecej4 · Accepted solution]

The .f source file suffix is for fixed format files. For free format files, use the .f90 suffix, or use the /free compiler option.

When you see a large number of error messages from the compiler for a source file that you believe to be error-free, check the compiler options and the file name and suffix, and make sure that the usual name conventions (of .f for fixed format and .f90 for free format Fortran) are followed.