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Line 3: \|alt_msg=NA \|type=[[ERROR]] \|message_desc=Model unstable. The model has gone unstable in the 2D domain. A number of [[TUFLOW_Message_2991\|WARNING 2991]] messages may be issued prior to ERROR 2998. There are a varieties of reasons that a TUFLOW model may go unstable in the 2D, these can include:<br> * Poor topography data * Inappropriate timestep * Poorly configured external boundary * Poorly configured 1D/2D model interface \|suggestions=Import the messages layer in to your GIS package. A negative depth can be caused by a number of things, look at the '''_zpt_check''' file to see if there is a steep change in topography, the '''uvpt_check''' shows the Manning's n value at each cell side. Check this roughness suitable.<br> \|suggestions=Import the messages layer in to your GIS package. Check for the occurrence of [[TUFLOW_Message_2991\|WARNING 2991]] messages. The first occurrence of these WARNING messages is the likely location of the source of the problem. Carry out the suggestions as listed for [[TUFLOW_Message_2991\|WARNING 2991]] to resolve the instability. A negative depth can also be caused by a badly behaving boundary condition nearby, check if this is occurring near a boundary. This can be 1D/2D, a external 2d (such as a HQ boundary) or a 2D/2D boundary.<br> ~~View the velocity vectors prior to the message are the flow patterns realistic.<br>~~ \|discussion_page=* [[Talk:TUFLOW Message 2998\|Discuss Message 2998]] \|link3=''

TUFLOW Message 2998: Difference between revisions