Neutral Conductor Current Carrying Capacity Check
When the engineer chooses to size the neutral conductor separately, in a three-phase + neutral single-core cable, the software checks if the neutral conductor's current carrying capacity is equal to or greater than the calculated neutral current.
Recommendation to resolve the error:
Revise the C.S.A of the neutral conductor or try to reduce the high neutral current due to the high third harmonics current and/or unbalancing of the loads.