When trying to download a map onto my ipad using Collector I receive an error message "exporting data for layer 0 failed" I have checked my settings in My Content Arc GIS online for both the map and the editable feature layer Excel spreadsheet, ensuring Sync, editing and sharing are enabled. But I still cannot download/replicate map to device. I cleared all redundant maps from My Content and have not had this issue before. The technical help on replication is very technical and I find it hard to follow! Many thanks in anticipation of help from forum.