Article ID: 120730, created on Mar 26, 2014, last review on May 11, 2014

  • Applies to:
  • Web Presence Builder 11.5


When you try to upload some .mp3 files on the "Document" tab, the upload fails with error code 500 and the file uploading never finishes.

The following error is present in the /var/log/httpd/error_log file:

[Sun Mar 23 03:12:04 2014] [notice] Apache/2.2.15 (Unix) DAV/2 mod_fcgid/2.3.9 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations
*** glibc detected *** /usr/bin/sw-engine-cgi: double free or corruption (!prev): 0x0000000002831e70 ***
======= Backtrace: =========
[Sun Mar 23 10:10:00 2014] [error] mod_fcgid: process /usr/bin/sw-engine-cgi(14142) exit(communication error), get unexpected signal 6

The following error is present in the /var/log/httpd/sitebuilder_error.log file:

[Tue Mar 25 11:04:23 2014] [warn] [client] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server, referer:
[Tue Mar 25 11:04:23 2014] [error] [client] Premature end of script headers: index.php, referer:


The issue might be caused by outdated version of the sw-engine package (sw-engine-2.9.5-201306041442.centos6.x86_64).


Download the package shipped with Parallels Web Presence Builder for Plesk 11.5.30 from the autoinstaller website and install it on the server. Remember to download proper packages for your operating system and architecture. For example:

~# wget
~# wget
~# rpm –Uvh update sw-engine-2.9.8-201308010957.centos6.x86_64.rpm libaps-1.0.6-798670.13080109.x86_64.rpm

Related Articles

Cannot upload files on the Documents tab: "Unable to upload the files"

Search Words

Cannot download a file


double free or corruption

error core 500

glibc detected

glibc error

Connection reset by peer


18f5eb2d7a7972323627b40f015d5a19 56797cefb1efc9130f7c48a7d1db0f0c 9305481d3bd31663b68451e3bfdec5a5

Email subscription for changes to this article
Save as PDF