TUFLOW Message 2231
TUFLOW Message 
CHECK 2231 - No ZP points snapped to HX line.  HX line not used to modify Zpts.
Alternate Message 
NA
Message Type 
CHECK
Description 
When using Read GIS Z HX Line points with type ZP are snapped along the HX line to set the elevation of the 2D cells along 1D/2D connection.  For the ZP points the 2d_bc “f” attribute is used to set the elevation and the “d” attribute is used to adjust the elevation.  This message informs the user that a HX line has been found without any attached ZP points.  This line is not modifying any cell elevations.
Suggestions 
Check HX line to see if a breakline is intended.
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