I'm a GIS intern working at a municipality. I'm having a very odd problem with my student trial version of ArcGIS 10.2. I have a couple of feature classes whose attribute tables appear correctly in the ArcCatalog table preview, but when I attempt to work with them in ArcMap, several of the fields do not appear. They don't appear in the list under the 'Fields' tab in the Properties manager either. Turning on all fields doesn't work. Has this happened to anyone else? Does anyone have any idea what could possibly be happening or how to resolve this issue? I'm stumped.