[SOLVED]Extens. Install: Custom install routine failure. error

HI!

I'm trying to install the latest Jem V2.2.0 on in my joomla 3.6.5 and I get the "Extension Install: Custom install routine failure." error message.

I've tried to find out the cause without luck so far.

About the environment: it is TurnKey LAMP VM. I've brought a Joomla 2.5.19 DB from a hacked website, put in the 2.5.19 files from the distribution, and upgraded the whole crap to 3.6.1 (via the obligatory steps).

The DB contains old EL 1.0.2 tables

I haven't installed all the components that were installed earlier as I'll be cleaning up the installation, but the installation seems to work normally otherwise as I was able to install Akeeba Backup without problems, for example.

Any help and hints are greatly appreciated!

Hi punkkinen,

thanks for your good description of the problem. Unfortunately this message will be shown by Joomla if something failed - not very helpful. In most cases a pre-confition is not fulfilled, but normally an additional notice message is shown telling details:


JEM doesn't need much but following:
- Database Type "MySQL" or "MySQLi" - but not "MyAQL (PDO)" (check Global Configuration - Server)
- PHP Extensions "gd", "json", "pcre", "ctype", and "SimpleXML" (check System Information - PHP Information)
- PHP 5.3++ but with Magic Quotes disabled (in higher versions it's completely removed)

Because your server is Linux there could be a problem with file or folder permissions. The user running php (not you) must have rwx on folders and rw on files.

You could also extract com_jem.zip from package file and try to install this one - maybe you get a helpful message what's wrong...

And the problem was missing gd.

thanks

... and in my case it was the "wrong" MySQL access (PDO instead MySQLi')
Thanks in any case!