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Article ID: 120612, created on Mar 19, 2014, last review on Jul 14, 2018

  • Applies to:
  • Plesk Automation 11.5


Cannot migrate the subscription with MSSQL database resource:

  File "/usr/lib/python2.7/site-packages/parallels/common/", line 993, in _get_active_node_ids
    if host.index('\\') != -1:
ValueError: substring not found
[ERROR] | Unexpected error: 'substring not found', migration is aborted. See the traceback above for more information.


The issue is caused by absence of MSSQL service node.

Source domain has MSSQL database and during the migration process PA tries to find appropriate service node for the migration. Basically MSSQL servers added through PA have the following host name pattern:

<..IP address..>\<..MSSQL server name..>

For example:\MSSQLSERVER

But external MSSQL server has only IP address as a host name, as a result migration tool cannot parse its host name properly and fails.

The behavior is caused by software issue PPA-771. The fix is included in MU #4.


Update PA installation to the latest version:

/usr/local/ppa/bin/ppa_update --install-updates

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