plz can any one tel me what is the cause of this error ifort: command line warning #10161:...

[sandal__bilel]

plz can any one tel me what is the cause of this error 

ifort: command line warning #10161: unrecognized source type 'user'; object file assumed

fpp: fatal: can't fopen file: subroutine.for
Abaqus Error: Problem during compilation - 
 

[Steve_Lionel]

Duplicate - see https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/805739