Is there way to prevent users editing Purchase Order sublists Once it's sent to warehouse ?

Are you saying like completely lock the PO down for certain users/roles? Workflow is generally the best option for locking records.

Or set the user permissions that theu cant edit p.o.

No entire PO, I would like to lock only Sublist of PO

Hello @Sandii, does wf lock the records for scripts as well? or it is for UI only.

@Jack it does and you gotta check context types