Article ID: 115174, created on Nov 21, 2012, last review on Aug 12, 2014

  • Applies to:
  • Plesk 11.x for Linux


Domains cannot be opened in Web Presence Builder. The following error is shown:


The error is caused by memory lack. According to system requirements Web Presence Builder 11 requires 768MB RAM minimum:
Hardware Requirements
Parallels Plesk Panel for Linux
        512 MB of RAM (1 GB when hosting many accounts; 768MB minimum when also using Web Presence Builder)

Check system memory with "free -m".


Add RAM to the server.

If Parallels Plesk Panel with Web Presence Builder are installed in Virtuozzo Container, the memory may be increased from the hardware node where the container resides.
After increasing memoty execute the following command in the container to complete upgrading of Web Presence Builder:

~# /usr/local/psa/bin/sw-engine-pleskrun /usr/local/sb/utils/upgrade.php

Another way is described on the forum. It's to create swap manually and complete upgrading:

~# dd if=/dev/zero of=/swapfile bs=1024 count=524288
~# mkswap /swapfile
~# chown root:root /swapfile
~# chmod 0600 /swapfile
~# swapon /swapfile

~# /usr/local/psa/bin/sw-engine-pleskrun /usr/local/sb/utils/upgrade.php

0a53c5a9ca65a74d37ef5c5eaeb55d7f 56797cefb1efc9130f7c48a7d1db0f0c a914db3fdc7a53ddcfd1b2db8f5a1b9c 29d1e90fd304f01e6420fbe60f66f838

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