Error:Hydrodynamic Diffraction (A4): ILLEGAL CONNECTIVITY.

krishna_ocean · November 9, 2015, 16:08

Hello Everyone,

This post is related to an error message while trying to study the motion response characteristics of a simple floating body using Ansys-AQWA as part of my research work. When I try to study hydrodynamic diffraction of the floating body I am encountering with error message as follows:

Error! Hydrodynamic Diffraction (A4): Solve aborted!
Error! Hydrodynamic Diffraction (A4): TERMINATED WITH ERRORS
Error! Hydrodynamic Diffraction (A4): ILLEGAL CONNECTIVITY. Element 60 is joined to element 153 and element 671
Informational Hydrodynamic Diffraction (A4): Mass/displaced mass are significantly different for structure 1 . Difference = -1.0%
Warning! Hydrodynamic Diffraction (A4): 372 MODELLING RULE #1 VIOLATIONS IGNORED BY GOON OPTION

Hydrostatics solve solution is working without solution getting aborted.

Can anyone please help me to figure out what could be the possible error? Is it something related to meshing of the model?
I am new to this software and if anyone could guide me with their knowledge it will be of great help. I hope someone would have encountered with the same error before but I couldn't find any thread giving solution for the same. Awaiting for a helpful reply.

Thanks in advance.

AQWA · November 23, 2015, 06:16

Hello everyone,

Has anyone else experienced this problem?

Did you sort this out?

I have modified everything, started my model again from scratch but nothing worked...

Any idea?

Thank you very much for your time

All the best,

vishalkuvar07 · August 6, 2022, 18:50

Try to change the value in connection tolerance.
Mesh-->waterline node generation --> connection tolernce

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November 9, 2015, 16:08	Error:Hydrodynamic Diffraction (A4): ILLEGAL CONNECTIVITY.	#1
krishna_ocean New Member Krishna Join Date: Sep 2015 Posts: 1 Rep Power: 0	Hello Everyone, This post is related to an error message while trying to study the motion response characteristics of a simple floating body using Ansys-AQWA as part of my research work. When I try to study hydrodynamic diffraction of the floating body I am encountering with error message as follows: Error! Hydrodynamic Diffraction (A4): Solve aborted! Error! Hydrodynamic Diffraction (A4): TERMINATED WITH ERRORS Error! Hydrodynamic Diffraction (A4): ILLEGAL CONNECTIVITY. Element 60 is joined to element 153 and element 671 Informational Hydrodynamic Diffraction (A4): Mass/displaced mass are significantly different for structure 1 . Difference = -1.0% Warning! Hydrodynamic Diffraction (A4): 372 MODELLING RULE #1 VIOLATIONS IGNORED BY GOON OPTION Hydrostatics solve solution is working without solution getting aborted. Can anyone please help me to figure out what could be the possible error? Is it something related to meshing of the model? I am new to this software and if anyone could guide me with their knowledge it will be of great help. I hope someone would have encountered with the same error before but I couldn't find any thread giving solution for the same. Awaiting for a helpful reply. Thanks in advance.

November 23, 2015, 06:16		#2
AQWA New Member Join Date: Nov 2015 Posts: 2 Rep Power: 0	Hello everyone, Has anyone else experienced this problem? Did you sort this out? I have modified everything, started my model again from scratch but nothing worked... Any idea? Thank you very much for your time All the best,

August 6, 2022, 18:50		#3
vishalkuvar07 New Member No Selection Join Date: Aug 2022 Posts: 1 Rep Power: 0	Try to change the value in connection tolerance. Mesh-->waterline node generation --> connection tolernce