I have a BPM and it stuck .There a wait step which it was ok
in the past and now it does not work , I assume that with a
refresh it may work . If i delete the BPM and import it again in
the configuration enviroment is it problem ?
It should not be a problem.
Aferter reimporting your bpm, check in SXI_CACHE that the active version is the version that you desire.
You can reactivate it from there if the version is wrong.
Check in transaction SWF_XI_CUSTOMIZING --> Maintain Runtime environment that
Schedule Background Job for Missed Deadlines
Schedule Background Job for Deadline Monitoring
are in green.