Fatal error session_start() - Failed to initialize storage module: memcache

[DrByte]

[19-Aug-2012 04:36:24 UTC] PHP Fatal error: session_start() [<a href='function.session-start'>function.session-start</a>]: Failed to initialize storage module: memcache (path: /home/4-web/41/9a/aquariumandpetworld.com.au/public/www/shop/cache) in /home/4-web/41/9a/aquariumandpetworld.com.au/public/www/shop/zc_install/includes/functions/sessions.php on line 92

Apparently your webserver's PHP is configured to use memcache for session storage, but the required dependencies are missing. That is something you'll need to sort out with the server's administrator/superuser.
It is not a Zen Cart issue.

[acidlink]

could it be because Session Auto Start: off? on the server

[DrByte]

Not likely. I always recommend session.auto_start be off. It is by default.

[acidlink]

memcache
memcache support enabled
Version 3.0.6
Revision $Revision: 310129 $

Directive Local Value Master Value
memcache.allow_failover 1 1
memcache.chunk_size 32768 32768
memcache.compress_threshold 20000 20000
memcache.default_port 11211 11211
memcache.hash_function crc32 crc32
memcache.hash_strategy standard standard
memcache.lock_timeout 15 15
memcache.max_failover_attempts 20 20
memcache.protocol ascii ascii
memcache.redundancy 1 1
memcache.session_redundancy 2 2

This is the memcache settings of the server

im a bit confused as to what to ask of them

Like do i just ask to turn off memcache?

[DrByte]

I honestly don't know. I've never personally encountered a server whose only way of handling sessions was via memcache storage, let alone whose own server configuration just automatically breaks the first time it tries to even USE it's own configured settings.

Start by telling them exactly what you told us here. It's their server. They're the experts on how they configured the server. And since it's a non-traditional configuration, they're gonna have to be the ones to fix it because they're the ones who know why they configured the server that way in the first place. They probably set something up for one specific customer's needs and don't even know they're causing problems to customers like yourself because they've done it in a way that's globally affecting everyone instead of just that one customer. Or maybe it's worse than that. Again, only they will know.

If they can't fix it, try another host who uses a normal configuration.