Problem of Join Architectural Columns, Structual Columns and Walls

[apikeairt]

When I Join Geometry of all (Architectural Columns, Structural Columns and Walls), line of Structural Columns in plan is missing and at the corner of Architectural Columns is show black point. In my graphic setting, Architectural Columns set project line and cut line at line weight no. 1 and Structural Columns set project line and cut line at line weight no. 5. Please help to solve it, thank so much.

[barthbradley]

Switch Join Order. 

The thing with Join Order, is that when two elements are joined together they share the same line work (Object Style Category), depending on join order.

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2014/EN...

[Anonymous]

To add to @barthbradley's comment....Architectural Columns inherit the properties of what they are connected to.

So check your view properties for structural columns.  I tend to not use architectural columns very often.