I found if you work on a GMS:FEMWATER project for some time, changing bcs and materials, GMS does not throw out the old XY1 series (mostly boundary condition values and unsaturated material properties). So you get a 3bc file with many XY1 series, many of them redundant, and particularly the ids of those series start to get large. When the XY1 id values exceed 250 FEMWATER reports an array bound error. It would be good if there was some way in GMS to renumber the XY1 series and throw out the old
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