Migration of subscription fails: Failed to execute received command for function ‘mkdir’

Symptoms

• Migration of a subscription in Plesk fails with the following error:

  Failed to copy web files for subscription 'example.com'.
  Migration tools tried to perform operation in 3 attempts: Failed to execute remote command on '203.0.113.2' server. Check debug log (usually at "%SYSTEMDRIVE%plesk_migratorrpc-agentdebug.log") for more details.

• On the source server, the following error is found on %SYSTEMDRIVE%plesk_migratorrpc-agentdebug.log:

  CONFIG_TEXT:
  [DEBUG] parallels | Create directory 'F:plesk_migrator'
  [ERROR] parallels | Failed to execute received command for function 'mkdir'
  [DEBUG] parallels | Exception:
  Traceback (most recent call last):
  File "panel-migrator-rpc-agent.py", line 850, in handle
  File "panel-migrator-rpc-agent.py", line 458, in mkdir
  File "os.pyc", line 150, in makedirs
  File "os.pyc", line 157, in makedirs
  WindowsError: [Error 3] The system could not find the specified route 'F:'

• The plesk_migrator directory exists on C:

Cause

Incorrect Temporary Directory was specified in the Temporary Directory field on the current Migration session on the destination server.

Resolution

1. Log in to the destination Plesk server.
2. Go to Tools & Settings > Migration & Transfer > 203.0.113.2.
3. Click Finish Migration to finish the current session.
4. Click Start a New Migration.
5. Put the corresponding data from the source server and fill in the field Temporary Directory with an existing path on the source server;
6. Click Start and choose the objects for migration.
7. Click Migrate to start the migration process.