TUFLOW Message 1621
TUFLOW Message 
ERROR 1621 - Reading determining blockage for culvert
Alternate Message 
NA
Message Type 
ERROR
Description 
TUFLOW builds prior to 2017-09-AC have an issue with reading the character E in blockage matrix.
Suggestions 
Use the latest TUFLOW built or modify the blockage matrix and the 1d_nwk to avoid letter E.
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