- Plesk for Linux
psadoes not restart:
# service psa restart
PSA is down, performing full restart.
Starting psa... Starting sw-engine-fpm: /usr/sbin/sw-engine-fpm: error while loading shared libraries: libruntime.so: wrong ELF class: ELFCLASS32
Plesk upgrade fails with the error:
/usr/bin/sw-engine: error while loading shared libraries: libruntime.so: wrong ELF class: ELFCLASS32
The issue is caused by the fact that
library built for 32-bit architecture and OS's is 64-bit.
Download and install
package for x86_64 architecture from
, for example for Plesk 11.5, CentOS 6:
# rpm -ivh http://autoinstall.plesk.com/PSA_11.5.30/dist-rpm-CentOS-6-x86_64/contrib/platform-runtime-1.0-38.rhel6.x86_64.rpm --force