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Error using dynamic meshing : 'Null cells detected'

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Old   June 26, 2013, 08:30
Default Error using dynamic meshing : 'Null cells detected'
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Im tying to use dynamic meshing on a valve, but when keep getting this error message when i try to preview the mesh motion
'replace_c_in_f_layering: cell of wrong type or NULL cell detected at layering zone'

i have an idea that it has something to do with the dynamic mesh zones.

If some one have any ideas on how to correctly assign dynamic mesh zones, please reply

Thanks in advance
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