Acronis True Image Backup not working

#1

I have both a ‘full PC’ and ‘Files and Folders’ backup scheduled to run. It has been working perfectly well until today. Neither backup completes but just fails after about 30 seconds with a message that the specified file does not exist.
Checking the file structure I find that nothing is out of place and can see no reason why the procedure should fail.

#2

This problem turned out to be router related. The ‘gateway’ icon disappeared from the ‘Network’ filer window. It was returned following a router shutdown and restart.