You can delete a large EPC using the runppmdelete command line program. This applies only if you have defined a process measure for the number of functions in a process instance. If you did so, you define a paramset as follows for the command line program.
The measure can also be defined at a later time (i.e., when imports are already blocked). In this case, the EPCs need to be recalculated using the runppmimport –keyindicator new command line program.