How to solve "ProcessScheduleInput: ..." problems?

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I have a follow up question because recently I tried to simulate the model again but a new problem occurs. It's related to convexity of the building. There are several errors there, "...vertex 3 is colinear with previous and next", "...The vertex points has been reprocessed as Sides", and "...collinear points that have been removed". I found similar questions regarding this, one propose to use SketchUp to solve it, another answer linked a video of troubleshooting that also use SketchUp. Is SketchUp necessary to resolve this problem? Can't I just use OpenStudio to fix this?

@Daffa since this is a new problem, please search for "openstudio convexity" or similar phrases to review existing posts for help. If you still can't find a solution, then please make a new question post.

@Daffa, for whatever reason your follow-up question didn't pop up (when I re-logged to UMH) - (?). In any case, I suspect your collinearity troubles are linked to this issue. Open your OSM with a text editor, and CTRL-F the problem surface. If the surface is adjacent to another, both should share the same vertices (yet in reverse order). You should be able to manually delete the "alien" vertex. Be safe - first try on a copy of your OSM.