SymptomsWhen starting migration via Plesk Migration Manager (Server -> Migration Manager), it fails with the following error:
Unable execute MigrationWait::make(): Unable to create bar: assigned values not like "minimal value <= current value <= maximal value (!= 0)
psaerror(string 'Unable execute MigrationWait::make(): Unable to create bar: assigned values not like "minimal value <= current value <= maximal value (!= 0)')
CauseThe problem is caused by the incorrect behavior of migration agent. It generates invalid status and the foreground fails with the error. However, the migration is continued in background.
To stop backup dumping process running in background on source server you need to kill all processes of Migration Agent. Find the processes with command "ps ax" and kill them.
Here is list of all migration agents:
Check running agent appropriate to hosting platforms you are migrating from. For example:
~# ps ax | grep PleskX.pl
Note: The problem will be investigated and fixed in future version of Parallels Plesk Panel.
As a workaround it is recommended to migrate data in "Import Mode". For details refer to article How to migrate Plesk data manually with Plesk Migration Manager 8?