I have had problems for years when using ArcGIS Online Maps for offline use in Field Maps, and the Collector program before Field Maps.
When creating an offline map using ArcGIS Online, the program says "Packaging." Then after a long time, "Packaging" goes away but an offline map may not have created. There is no error message about the failure. Nor does it say success if it makes an offline map.
There is a second problem. Often when ArcGIS Online successfully makes an offline map, when you download the offline area onto a mobile device using Field Maps, it fails to download, saying "Download Failed." With retries, often with many retries, it might work. Sometimes it never works. I was up until 3:00 A.M. in the morning, many times, trying to get online maps onto a mobile field device for field data collection starting in the morning.
Opening a technical support case on this is not the solution. I've done so at least a dozen times.
An exception is happening in Field Maps when the download failed. The software knows what caused the exception. It would not be a difficult programming job to determine what went wrong and provide a meaningful and useful error message. Better yet, fix the error in the software that caused the problem. Engage ESRI's software engineers and programmers to fix the error and to provide meaningful error messages upon all successes and failures, in ArcGIS Online and in Field Maps.
This is a flaw in ArcGIS Online and a flaw in Field Maps.
By way of my background, I have been programming professionally since 1982.
I was certified by the Institute of Electrical and Electronic Engineers (IEEE) Computer Society as a Professional Software Engineering Master, from July 2015 until July 2024, when I let my certification expire.
I hope this helps.
