Troubleshooting

How to make gallery faster?
If you using thousands of picture Imagevue is becoming filesystem demanding, especially with large image and folder arrays.
The slowdowns can be alleviated by moving to a faster host, splitting images to more folders or using smaller images.
http://imagevuex.com/forum/viewtopic.php?p=9795#9795

Everything is enabled but still getting error "could not mail"
We use php mail() function, no smtp or anything, simplest function. On some servers it might be disabled. Before posting about that issue please read:
http://imagevuex.com/forum/viewtopic.php?t=4460

Failed to write session data
This happens every so often, session data is some small info to identify user who is logged in. This is stored on server, in temp directory. But sometimes this is either misconfigured or just directory not created or unwritable. We can't fix it, this should be forwarded to your hosting support.
http://imagevuex.com/forum/viewtopic.php?p=12261#12261

Can't upload files bigger than X Mb?
This restriction is set in php.ini in upload-max-filesize. If you don't have access to php.ini, please consult your hosting provider about how to change it.
http://en.php.net/manual/en/ini.core.php#ini.upload-max-filesize

Upload, edit config doesn't work.
You probably have suhosin security module installed, properly configured it poses no problems for imagevue but some settings can interfere with normal functionality.
Applies only if your Diag > phpinfo mentions 'suhosin' somewhere.

When editing configs, _bottom_ save button still works. If uploader doesnt work you have to disable suhosin, read on:

How to turn off suhosin and mod_security to get multiple-file uploaders to work?
1. You have to upload .htaccess file in your gallery root with the following:

2. Disable suhosin:
php_flag suhosin.simulation On

3. Disable mod_security:
SecFilterEngine Off
SecFilterScanPOST Off

If .htaccess directives not working or display error 500, you either trying to block extension you don't have installed (check diag page), or this functionality is just disabled on your server.

Where can I find the .htaccess file (and other files) of imagevue (x2) to disable suhosin?
You just create file names '.htaccess' in any text editor like Notepad. The only thing, on MacOS it's better to create 'htaccess' file first (without dot), upload it and then rename to '.htaccess'

Windows IIS 403 Access Denied when accessing Imagevue Admin
This is caused by IIS setting, 'Custom Error Page' or something.
To disable it you should go to IIS Control Panel, choose your site, click Edit Pages icon, then find 403 page and delete custom IIS error page.

PHP Optimizers (namely eAccelerator) causing random errors and nothing works.
If you have something like this in Diag > phpinfo:

with eAccelerator v0.9.5.1, Copyright (c) 2004-2006 eAccelerator, by eAccelerator
with the ionCube PHP Loader v3.1.31, Copyright (c) 2002-2007, by ionCube Ltd., and
with Zend Optimizer v3.3.3, Copyright (c) 1998-2007, by Zend Technologies

try to add this .htaccess to your site:

php_flag eaccelerator.enable 0
php_flag eaccelerator.optimizer 0