The following link (
http://fmepedia.safe.com/articles/Error_Unexpected_Behavior/FME-cannot-read-or-write-to-Esri-Geodatabase-license-error-messages) is describing this issue, but there is no details on how to really fix it, I am using ArcGIS 10.3 with a floating license and FME 2015 with floating license too, and I am still unable to Read or Write to Esri Geodatabase. On ArcGIS 10.2.2 and FME 2015 I can read and write Geodatabases whith the same types of licenses without any problems, Should I downgrad may ArcGIS products or what !!
Any help is appreciated
Best Regards,
Ahmad