how to get workflow template number

Hi,

I need to check the workflow log of few invoices. It seems that the workflow for these invoices is trigerred by a batch job.

I checked the completed work items of a user and found few invoices approved by him. But when i check the log for that completed work item, I can find only 1 step in the workflow log, which is standard task.

The class obtained from this task is not useful. It has a process dialog method in it.

I need to check the workflow logs for these invoices. How do i check it ?

Also, when I checked these invoices from the custom tcode, it does not have the option/button to display the workflow log.

Please help. i have attaced few screenshots as well.

Regards

Meenakshi