Task for Executing Customised Program

[Xue Jing]

Hi all,
 
I'm with 4.0B.
 
In order to execute my customised program in a workflow, I have created a
task by using object type TRDIR and its method 'EXECUTE'. I also created a
container element "Variant" referencing VARID-VARIANT. I set initial values
to the Program Name and Variant.
 
When I test the task, I encountered  the following (each time before test,
I did refresh Organisational Environment):
1. first test, no problem - no error message;
2. second test onwards, I encountered these error message in debug.
 
Error messages
I159(W8)   Element VARIANT will not be overwritten
I159(W8)   Element _WI_OBJECT_ID will not be overwritten  <--this contains program name.
 
What's the cause of error and how to correct them?
 
I guess to display a program within workflow must be a quite common task. Please provide some hints and help.
 
Many thanks.
 
Have a nice day,
******************************
Xue Jing
 
Application Programmer
SAP Service
Weir Warman Limited
Tel :    00 61 2 9934 5363
Fax :   00 61 2 9934 5199
http://www.warman.com
******************************
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