I have the latest avast [ 17.2.2288 / 27-Feb-17 ]
And I'm running Macrium 6.3.1745
To reproduce the error,
--I start Macrium,
--goto the 'scheduled backup tab'
--Right click on 'Differential' on my backup job
--Select 'Run now'
A pop-up box briefly flashes on the screen (Way,way to fast to read) and the 'Last run time' column updates and '0x13b' appears the the 'Last result' column.
Nothing appears under the 'Log' tab.
If I disable the Avast 'Self defense module' and reboot, the same process starts the backup job running.