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How to solve the error message of E2558 multiple networks in macro section?

Issue

Customer has concerted one PL7 application into Control Expert where it pops up “E2558 multiple networks in macro section (solution for SFC-Project-Setting 'Allow multiple token': move this network to chart section)”
How to solve this error message?

Environment

E2558, SFC，control expert

Resolution

The message is self-explainable as inside macro section, there only allows one network.
The problematic part is illustrated in the blue rectangle

Diagram Description automatically generated