Admin Suddenly Unavailable

[DrByte]

"call to undefined function" means PHP isn't aware of any function by that name ... and that's usually the result of PHP not having already loaded the file which contains that function.

So, in short, it tells me that one or more files is missing from your server, or have been damaged or replaced by addons or something.

This is the quickest way to find out what might be wrong with your files:
http://www.zen-cart.com/wiki/index.p...Obscure_Issues

[bendlikewillow]

Hi DrByte

Thanks for the speedy advice, really appreciated. Not sure how the code could have changed - one minute it's all fine, then it's not! The site's not been moved from one server to another, but the application pool was changed. Either way, there's clearly something wrong, so thanks for your guidance.

[DrByte]

Zen Cart runs from PHP files and database data.
If your host is mucking with things outside that, such as the webserver engine services (apache etc), and/or PHP, and/or the MySQL engine and its configuration ... etc ... then that would of course cause all manner of unexpected and unexplained problems. And all of those are things we can't fix for you, since your host is the expert in those matters.

[bendlikewillow]

Very true and that's always part of the problem with virtual hosting - a change is made on the server and suddenly something else is affected.

Mind you, some times it's hard to get a straight answer from a host and you wonder why your code's suddenly stopped working when you have neither changed it or re-uploaded it. Thanks again for your help Dr Byte, much appreciated advice.