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Updating from 6.2.1 to 7.4.2 causes 500 error


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I am long overdue an update because I keep hitting this issue.

So far -

  • I've updated the ioncube loader to version 6 for PHP 5.6 before trying to update.
  • I meet all the system requirements 
  • I've check if file permissions change and they all seem the same as the original files
  • I've deleted the .htaccess file just incase
  • I've check the memory limit which is 256MB.

I'm out of ideas as to why all pages show a 500 error when I try to run the update.

 

 

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Do you have SSH access to the box itself? If so, try using the CLI upgrader . I've found this to work in cases where the web interface won't work.

The CLI upgrader can be found in whmcs/install/bin, and can be accessed via ssh . To use it, just type the following

php installer.php (will show a ton of options)
php installer.php -u (will do the upgrade)

Like I said, I've seen this work when others failed, so it's definitely worth a shot here

If that fails, take a look through install/logs/installer.log. Usually (ok, sometimes:)) there's a helpful tidbit here that may help you get the error resolved

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