While installing Aegir in a VM, during the hostmaster installation, I got the following error:

Do you really want to proceed with the install (y/n): y  
PROVISION_SITE_INSTALLED                                             [error]  
The external command could not be executed due to an application     [error]  
Drush command terminated abnormally due to an unrecoverable error.   [error]  
Error: Unsupported operand types in  
/var/aegir/drush/includes/environment.inc, line 916  

Drush version 4.5

  • any one helps me to sort out this issue....
    – srini
    Feb 12, 2012 at 5:35

1 Answer 1


Here is an issue on Drupal Groups: http://groups.drupal.org/node/96639.

Possible solutions:

  • Check if your system is Ubuntu (the installation script assumes that it is)
  • Remove everything in /var/aegir and run the installation script again.
  • Run 'mysql_secure_installation' command and finish it successfully. Aegir checks for security flaws during installation and block it if, for example, you have anonymous users enabled in mysql.

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