If get the error
“An error was encountered in the transport layer”
when you try to synchronize an existing SSAS-database onto another empty SSAS instance for the first time, a solution could be to take a backup of the source SSAS-database and restore it onto the new SSAS instance and then do the synchronization.
If you get the error below when processing a cube in SSAS. You might have partitions in the cube, that doesn’t have corresponding data in the underlying relational tables.
Errors in the OLAP storage engine: The restrictions imposed on partition slice where violated.
A solution could be to just delete the affected partitions from the cube.