Unable to create new subscription with IceWarp mail server


2016-11-16 13:04:57 UTC


2017-08-16 16:18:10 UTC


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Unable to create new subscription with IceWarp mail server

Applicable to:

  • Plesk 10.x for Windows
  • Plesk 11.x for Windows


Unable to Create subcription with IceWarp mail server
error : Smb_Exception_Syntax::handleError(2, psasem_lock() failed for semnum 15 was not released by owner before terminated


IceWarp mail server has its own MySQL database and uses ODBC driver to connect to it through PHP engine. IceWarp by default uses ODBC connector 3.5, and it was affected by bug in the MySQL ODBC 3.5 , but it was fixed in ODBC 5.1 version.


  1. Uninstall MySQL ODBC x64 via Add/Remove programs
  2. Install MySQL ODBC driver 5.1 via Plesk autoinstaller.
  3. In windows registry change path to ODBC driver in HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\ODBC\\ODBC.INI\\Icewarp

Set Driver value to C:\\Program Files (x86)\\MySQL\\Connector ODBC 5.1\\myodbc5.dll

  1. Change value Icewarp to MySQL ODBC 5.1 Driver in HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\ODBC\\ODBC.INI\\ODBC Data Sources

  2. Create new subscription and mailname.If you cannot create a mailbox in old subscription just check that the corresponding domain exits on IceWarp server.

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