Function module ZXX_XX_XX does not meet the workflow conventions

Hi all,

I have a problem:

I created a function module for use in my workflow.

But when I associate the rule with the tcode PFAC_CHG with my function module I recived this error:

Function module ZXX_XX_XX does not meet the workflow conventions

I know that the error provide from my interface of my module funcition but I try too do a lot of things like:

Put into tab Changin and tables the next values:

Table parameters:

1. 1. AC_CONTAINER with structure SWCONT
2. 2. ACTOR_TAB    with structure SWHACTOR

And not works , too I try to include in the code of the module function the INCLUDE <CNTN01>.

Please anybody can help me please,

Thank You very much,

Carlos.