It's a bug in the complier.

http://computer-programming-forum.com/49-fortran/16b1bbfde9780a5d.htm

 Thank you for your time and answer. 

I try to run my program in power station because of IMSL libraries which are very useful.

Could you tell me another compiler which has such a powerful library?

Any suggestions  will be greatly appreciated.

good luck.

Please, use Fortran 66. Good luck.

Please, use Fortran 66. Good luck.

 IS this compiler is compatible for Fortran 90/95 or the later one?

Thanks in advance.

Try to get the Pro edition of Intel's Fortran compiler, it comes bundled with IMSL library.