Hello Wim - Are you referring to an EMPTY VALUE for the Design Pressure property or a value that says NULL ? I have placed a report on a DGN file with no values in the design pressure property. I then tried to updated Design Pressure property for one of my pipelines via element info dialog. It will not allow me to place NULL in Design Pressure. I get Property value is not valid....... Thanks in advance, Wim - Ron Plaisance
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