Kick start the next workitem after the previous one was complete

[Elias Bergan]

Experts,
 
I have a workitem that is completed (and hence Flavio's and Michel's
suggestions
for completing a workitem a few days ago does not apply) and the workflow
has the status 'in process'.
However, the workflow does not continue. Is there a function module,
transaction
etc. to kick start the workflow again, i.e. to trigger the next step in a
workflow?
I found and tried the function module SWP_CONTINUE_WITH_NEXT_WIS but did not
get it to work.
This is at least the second time within a few days that I have encountered
this problem and I would really
appreciate it if someone has a solution.
 
Regards,
Elias Bergan