TUFLOW Message 1101
TUFLOW Message 
ERROR 1101 - Less than the mandatory 20 1d_nwk attributes found
Alternate Message 
ERROR 1101 - Less than the mandatory 10 1d_pit attributes found.
Message Type 
ERROR
Description 
1D network layers (1d_nwk) should have the GIS attributes as described in the TUFLOW Manual.
Suggestions 
Check the GIS attributes match those described in the TUFLOW manual or a 1d_nwk_empty layer created with the latest TUFLOW release. If it seems to be correct, recreate the layer from scratch using a 1d_nwk empty layer created with the latest TUFLOW release. 
Check that the 1d_nwk layer being read in via the Read GIS Network ==  command is a network and not a boundary condition (1d_bc) or cross-section (1d_tab / 1d_xs) layer.
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