Custom Rule - Problem in passin values From Rule Container to WF Container?

Question

Hi Guys,
I am having hard time passing values back from my custom rule. I have created a custom rule to determine the agents in PFAC which takes in the Person number as import element of container. It determines the Manager as agent and I am passing Managers Person Number back to workflow. If he dont approve the Request then it will be passed to his boss. In this case I will pass this imported Mangers Person number back to rule so that his boss will be determined as agent. I  have created ZRULE function module. I am passing value back from Rule container to Workflow Container using following code.
swc_set_element ac_container 'SUPERPERNR'  lf_super_pernr.
I have created a element SUPERPERNR on rule container and workflow container as well .The problem is in the Rule container I am not able to create SUPERPERNR as export parameter. The tick mark is grayed out and there is no option for setting it as export.
My question is do I have create a Export element on Rule container or Not? If i just write the code
( swc_set_element ac_container 'SUPERPERNR'  lf_super_pernr ) will it set the value in WF container? In my case it is not setting. I have to bind the values from rule container to WF container and if My rule container element is not allowing me to click the tick mark as export how can i pass value of of rule container back to WF Container?
Please help me guys.
Thanks,
Manish.

Answer 1

Hi Manish,
     Same scenario I have developed in my system. This all steps I did in my system.
1) Created a Z function module which takes import parameter (Parameter name = 'EMP') in the
    format 'US100123'.
2) This in turn fetches back the supevisor or boss as an export parameter (Parameter name = 'BOSS') in
     the format 'US100245'.
3) This function module is attached to a BUS object(SWO1).
4) While attaching this function module to BUS object you need not do any manual coding it is done
    automatically.
5) Implement, release and generate this BUS object.
6) Create a new variable in your workflow (Parameter name = 'ZSUPERVISOR') for storing the value
    which is returned by the Z method.
7) Create a new task.
8) Put in your BUS object name, then your Z method name, select background processing checkbox.
9) Press save, it will ask for transfer of missing elements, select yes.
10) Then you will see a green button below your Z method name click on it.
11) Top portion contains your Z method variables, below to it you have the import parameter window in
      this window you should have &EMP& -> &EMP&., below to import parameter window you have
      export parameter window in this window you should have &BOSS& <- &BOSS&. (This is method
      binding).
12) Now click on enter button then click on back button it will generate the task binding automatically
     just press yes.
13) Now click on binding exist button.
14) Here you have the Workflow container variables as well as the system container variables.
15) In the import parameter window left portion is for your workflow variables and right portion is for your 
      method variables. In my case i had sent workflow initiator and fetched his supervisor. The Import
      parameter binding was &WF_INTIATOR& -> &EMP&. and the export parameter binding part was
      &ZSUPERVISOR& <- &BOSS&.
16) Save the task and run the workflow.
Regards.
Vaibhav Patil.