CAPE-OPEN

Perhaps the first thing to do it to check whether it is a problem with the unit operation or with the PME.

"The stream origin flies away" -is this Aspen Plus? Or another PME?

Can you check if it works in a different PME? E.g. COCO/COFE?

Thanks Jasper for your reply.
By observing the system reaction of Aspen Plus V10.0 original unit operation when connected.I found that when multiple streams were connected to one port of an unit operation, the system would automatically create a small dislocation in the connection segment of the stream. So that the user could see the different streams clearly. This mechanism should have caused the previous problem.