Here is a solution for a case when a group of files needs to be processed only when all of them are present, i.e. no file is missing.
The example below demonstrates using the “Halt on condition” action in order to halt project execution when fewer than 4 files are present in a list of files.
Enable/disable the filter action in the “List of files” table in order to trigger the halting condition.
file-count-halt.morph (2.9 KB)