The state of the purepath is grayed : Unable to determine PurePath success because of the following reasons:
Events of this PurePath have been skipped by one of the involved agents. Maybe there was a network or load problem
Not the whole PurePath has been captured as the node limit is exceeded or due to a too high subpath nesting depth
It sometimes happened. Check place on the purepath where corruption is marked. Most of the time this is because of complexity of purepaths, where one of async threads doesn't come back in time, agent is waiting for response. If yes, it is option to extend time, where Dynatrace is waiting for responses but this has extra cost for appmon server performance.