This item has been identified as an outstanding known issue. Aworkaround is provided below.
In the Classic Experience when using the pop out formula editor and switching between two module tabs, re-selecting the line item in the origin tab causes an error is displayed.
· Use the NMX.
· Click the chevrons to go back to the line item editor when back in the origin tab.
· Manually dock the editor to the side and click chevrons to revert to that state when back in the origin tab.
If this workaround is not suitable in your use case, please contact Support atsupport@anaplan.com.
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Internal Reference: LOTUS-1581
Solved!去解决方案。