Symptoms

  1. It is not possible to connect to the Plesk , with a 500 Internal Server Error or "502 Bad Gateway" error.

  2. The following error appears when attempting to run any Plesk CLI:

    /usr/bin/sw-engine: symbol lookup error: /usr/bin/sw-engine: undefined symbol: _ZNK3APS4Meta10ScriptInfo13isPriveledgedEv

Cause

The upgrade was not completed successfully. The libaps and sw-engine packages are from different Plesk versions.

Resolution

  1. Check the installed libaps package version:

    #rpm -qa | grep libaps
libaps-1.0.4-768202.12060417

    Find below the supported package and Plesk versions:

    Plesk 10.4.4  - libaps-1.0.2
Plesk 11.0.9  - libaps-1.0.4
Plesk 11.5.30 - libaps-1.0.6
Plesk 12.0.18 - libaps-1.0.7

  2. Check the sw-engine package version:

    #rpm -qa | grep sw-engine
sw-engine-2.13.11-centos5.201407011509

    Find below the supported package and Plesk versions:

    Plesk 10.4.4  - sw-engine-2.3
Plesk 11.0.9  - sw-engine-2.5.1
Plesk 11.5.30 - sw-engine-2.9.8
Plesk 12.0.18 - sw-engine-2.13.11

  3. If the libaps package version is not correct, uninstall it. The example below is provided for Plesk 10.4.4:

    # rpm -e libaps-1.0.4-768202.12060417 --nodeps

  4. Install the correct version based on your Plesk version, server OS, and architecture. The example below is provided for CentOS 5 x86_64 running Plesk 10.4.4:

    #  wget http://autoinstall.plesk.com/PSA_10.4.4/dist-rpm-CentOS-5-x86_64/contrib/libaps-1.0.2-669424.11082615.x86_64.rpm
# rpm -ihv libaps-1.0.2-669424.11082615.x86_64.rpm

  5. Run /usr/local/psa/admin/sbin/autoinstaller.

  6. If the autoinstaller shows that all components are up-to-date, make sure sw-engine and libaps are for the same Plesk version. Update the first or second package as necessary.

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