I started to get this error in browser log while displaying a cached service in a webmap.
Displaying service in ArcMap is OK.
The error comes from the service, the log says:
message:"Unable to load image: http://myserver/arcgis/rest/services/Ortho2015/MapServer/export?dpi=96&transparent=true&format=png32..."
Thanks for your help!
Update: in a list of issues addressed in 10.3.1 I found following:
Default extent of basemaps are not honored when the coordinate system is other than WGS 1984 Web Mercator Auxiliary Sphere.
What exactly "are not honored" means? I use base maps both in WGS 1984 and Israel ITM projected coordinate systems. Can it be the issue?