Mobile Projects Center returns the error "Unable to find the specified file" when adding a feature service if the feature service has labels enabled using an expression in MXD before publishing it as a hosted feature service.
Last Published: August 21, 2015ArcGIS for Windows Mobile
Bug ID Number
February 26, 2015
June 11, 2020
ArcGIS for Windows Mobile
After review by the development team, it has been determined that this issue is related to a known limitation with the software that lies outside of Esri's control. The issue's Additional Information section may contain further explanation.
Known Limit that Labeling using an expression is not supported, http://resources.arcgis.com/en/help/windows-mobile/10.2/index.html#//007v0000000600000
ArcGIS for Windows Mobile supports labeling on a layer in ArcMap and annotation that is stored in a geodatabase. However, it is recommended that annotation are used for text instead of labeling, since labeling on-the-fly consumes battery. See Help documents for other limitations in using labels and annotation with ArcGIS for Windows Mobile projects.