TUFLOW Message 1522
TUFLOW Message 
ERROR 1522 - Unrecognised or unsupported operating control variable in line below, or invalid line
- Operating Control Line = <variable name> == <dHUD or dH12>
 
Alternate Message 
NA
Message Type 
ERROR
Description 
This error is a bug that will occur if you try to use the operating control variables "dHUD" or "dH12" using the 2013-12-AD or earlier build of TUFLOW.  
See also point 94 in the 2013-12 Release Notes.
Suggestions 
Upgrade the build to at least 2013-12-AE.
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