I have ArcGIS Desktop 10.5.1 and ArcGIS for server 10.3.1 installed on different windows machines. I was told by my software provider, that I can publish all services although the versions are different. This is true for the most part, but I cannot publish a 10.5.1 images service from a mosaic dataset. The error windows shows a generic error, but the log files indicate the path in invalid. The path is however OK as I have checked it out from a Rastercatalog using the same data. Can anyone tell me what is going on here? Is 10.5.1 not able to publish imageservices from mosaics? I have published single rasters as an images service, so why not mosaics?