I have a map where I've loaded the bulk data from the company database. I have data in an excel spreadsheet that I have imported and joined to one of the data sets in the corporate data. From this joined table I have created a bunch of layers using the "Create Layer from selected features" function. All was working OK (points were plotting, all layers were working fine) until one day last week the attribute tables of the layers I had created were blank and the points were no longer plotting on the map. Both the corporate database attribute table and the imported table are full of data and not blank, also the corporate data plots on the map no problem. However my created layers no longer plot on the map.
Does anyone have any solution or advice on this matter?