Run ProcessFlow using PLSQL

Question

I have following setup in OWB
Under Process Flow Modules I have module called "Test_Module" and it has a package called "test_pkg" and inder that there is a process flow called "test_flow"
In Test Flow process module very first start_1 activity IO have a varchar parameter called P_Param1
I am trying to run this process flow using PLSQL as below
BEGIN
OWF_MGR.WF_ENGINE.CreateProcess (itemtype => 'test_pkg',itemkey => '123445678',process => 'test_flow');
OWF_MGR.WF_ENGINE.SetItemAttrText (itemtype => 'test_pkg',itemkey => '123445678',aname => 'P_Param1',avalue => 'Test Value');
-- OWF_MGR.WF_ENGINE.StartProcess(itemtype => 'test_pkg',itemkey => '123445678');
COMMIT;
EXCEPTION
WHEN OTHERS THEN
dbms_output.put_line(SQLERRM);
END;
But when I try to do that I am getting below error
ORA-20002: [WFENG_ITEM_ATTR] TYPE=test_pkg KEY=123445678 ATTRIBUTE=P_Param1
It seems that this PL/SQL code unable o recongnise the Parameter. Did anyone knows whats wrong with this??
Thanks

Answer 1

For anyone who interested on this issue please see below sample
This is my environment
Under Process Flow Modules I have module called "Test_Module" and it has a package called "test_pkg" and under that there is a process flow called "test_flow"
In Test Flow process module very first start_1 activity I have a varchar parameter called P_Param1. This was deployed to "OWF_LOCATION1" location
SO we can execute above processes Flow as below
BEGIN
DBMS_OUTPUT.PUT_LINE('Result: ' || TO_CHAR(wb_rt_api_exec.run_task(_'OWF_LOCATION1','PROCESSFLOW','test_flow', P_Param1=Parameter_value', null, 1)));
END;