Is the IMSL routine DZPOCC, a Function or a Subroutine?

[Yitzak_B_]

IMSL documentaion describes DZPOCC as a subroutine requiring the CALL DZPOCC (NDEG,COEFF,ROOT). However The latest download IVF9.0_28 does not think so. It regards it as a function and sends a compilation error: The CALL statement is invoking a function subprogram as a subroutine. [DZPOCC]

note: it did work well with IVF9.0_18

Thanks for your help

[Steven_L_Intel1]

My guess is that you have a declaration something like:

DOUBLE PRECISION DZPOCC

The IMSL-provided declarations show this as a subroutine. I'll note that DZPOCC is the "Fortran 77 interface" version, if you were using the new style with USE ZPOCC_INT, you'd just call ZPOCC with double arguments.

[Yitzak_B_]

Thanks Steve, Its working fine.

Yitzak