I can't count the number of times that I get an error upon export that "Scene can't be exported while rendering". A alot of times, this is caused by viewport render being turned on, on a view or camera that isn't visible. This can really really really be annoying to trackdown which view is still rendering, manually stop it, and attempt to export again.
Can we get a checkbox in the render options to "Force Stop Rendering on .ORBX export"? Or at least in the error field to call out which views are problamatic?