Timeout option in wait condition doesn't appear

Hi all,

I have created a wait condition on a workflow using the Process Execution time as a condition. Under that wait condition a lot of chilren actions take place.

Now I need to change the Process Execution to a Timeout. But the TimeOut option is not present in the list. If I create a new wait condition in any other are of the workflow I get the TimeOut option, but not in that existing condition that I need to change. Has anyone come across this and saw an explanation to it ?

Thanks,

Romeo