RAM is showing a failure for "web plate strength due to out of plane transverse load" but I do not believe it applies. Below is a figure from the Design of Wrap Around Gussets paper referenced at the bottom of the results. It shows there should be no out of plane loads applied to the beam or girder but that does not seem to be what RAM is doing. Attached is the Connection Data and Design Report for reference. Using V13 Upate 9.
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File uploaded. Filename HBBB. Spending further time investigating, the demand on the gusset-to-beam and gusset-to-girder connection changes significantly depending on whether it is directly welded or bolted.
Can you send your file? I threw together a horizontal brace connection per AISC 36016 ASD and I'm not seeing that web plate check at all. I also have version 13.09.