TUFLOW Message 0640
TUFLOW Message 
ERROR 0640 - Cannot have more than "<>" GRID layers open at once.
Alternate Message 
NA
Message Type 
ERROR
Description 
This error will trigger if more than 100 grids are opened concurrently by TUFLOW (for reading or writing). This error should never be triggered as there are very few processes (if any) within TUFLOW that read or write grids concurrently.
Suggestions 
If your model is triggering this error, it is most likely caused by grids not being closed properly by TUFLOW (caused by an internal logic error). If this is the case, please contact support@tuflow.com.
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