How can I use parallel processing in ABAP?

Hello everyone,

I am experiencing some difficulties in the implementation of a function to use under parallel processing.
Here's what I have:

1. Function Group created;
2. Function Module created;
   1. Attributes: Normal Function Module;
   2. Import: Variables that I want to process internally ("Associated Type": ANY; "Pass Value" selected);
   3. Export: Variables that I want to retrieve their values ("Pass Value" selected);
   4. Source Code: implementation of the function using the Import Variables and assigning them to Export Variables.
3. Program in ABAP created as follows:

LOOP AT i_tab INTO aux_tab.

index = sy-tabix.

CONCATENATE 'Task' index INTO taskname.

CALL FUNCTION 'Z_FUNCTION'

     STARTING NEW TASK taskname

          DESTINATION IN GROUP DEFAULT

               PERFORMING receive_results ON END OF TASK

     EXPORTING

          var1 = var1

          var2 = var2, and so on...

ENDLOOP.

FORM receive_results

     USING

               taskname.

     RECEIVE RESULTS FROM FUNCTION 'Z_FUNCTION'

          IMPORTING

               var3 = var3, and so on...

ENDFORM.

If I don't use the "RECEIVE RESULTS FROM..." function, everything works (except for the fact that I don't receive the value of 'var3'). However, when I use such function, I receive this error: CALL_FUNCTION_REMOTE_ERROR (short text: "The function module 'Z_FUNCTION' cannot be used for 'remote' calls.").

Even if I don't use generic types for the import variables and check the "Remote-Enabled Module" option I still get errors, but this time they don't have anything to do directly to my code.

Thank you so much in advance!