An erroneous message {Solve failed: "must be part of a recycle" [Ok]} was obtained during an attempt to solve an inner sub-flowsheet while converting a flowsheet from COCO 2 to COCO 3. This sub flowsheet did not cause an error in COCO 2.
This module from an inner Custom Unit Flowsheet was copied and placed into a new, blank flowsheet, where it still would not run do to a non-existent recycle for which it insisted to be a part. I think a flag has been set in error and it has ruined this module which solved without error in COCO 2. What is the problem? Can it be fixed?
It seems to me that problems solved in COCO 2 or problems not found in COCO 2 are back again or here to be solved in COCO 3. Progress comes at the high price of time!