Sorry to hear you're having installation woes. It's always tricky given the variance in how webfarms set up their servers.

So, I see a bunch of advice, including;

http://www.silverstripe.com/site-builders-forum/flat/1733
http://www.silverstripe.com/site-builders-forum/flat/2837

Which point to
(a) Increasing memory limit beyond 32MB

(b) Manually setting the .htaccess file's rewrite rule;
(-)RewriteRule .* sapphire/main.php?url=%1&%{QUERY_STRING} [L]
(+)RewriteRule .* /<<subfolder>>/sapphire/main.php?url=%1&%{QUERY_STRING} [L]

c) Noting that WebDrive uses Mod Vhost Alias:
http://httpd.apache.org/docs/1.3/mod/mod_alias.html
VirtualDocumentRoot /home/httpd/vhlinks/%0/
"I assume the VirtualDocumentRoot is causing the problem for SilverStripe." says a poster.

(d) A developer here sorted the issue by changing the core/ManifestBuilder.php line 39
// Config manifest
//   $baseDir = dirname($_SERVER['SCRIPT_FILENAME']) . "/..";
$baseDir = '/path/to/files';

If you do get it solved (item d could be your savior) we would love to know precisely what you needed to do so that we can patch the software with a fix. Until someone does this, others will stub their toe on webdrive which is a shame.

Finally, do note that "cannot redeclare" implies it is including the same file or code twice, so I'd hope you didn't accidently unzip SilverStripe twice and that its somehow embedded in itself.

Okay, point (A), I think it is fixed by your latest SS 2.2.1 code, so it is automatically set to 32M (as my phpinfo reported the server setting is at 20M)

I've added "php_flag allow_call_time_pass_reference on" on .htaccess so I get all green for installation.

point (B), if i add that line in into .htaccess before the installation, I get error 500. If I remove it, I get the installation screen.

point (C), I do not understand what you suggest there, it doesn't get me far.

point (D), no such line at core/ManifestBuilder.php line 39. However a search for "dirname($_SERVER['SCRIPT_FILENAME'])" found it at line 85 and 382.

So I'm back to square one that it doesn't help me with the solution from 2007. I need a solution that is for SS 2.2.1.

Please help again.

This is what I had in my .htaccess file with the site running in PREVIEW mode:

RewriteBase /
php_value memory_limit 64m
php_value allow_call_time_pass_reference 1
### SILVERSTRIPE START ###
RewriteEngine On

RewriteCond %{REQUEST_URI} !(\.gif)|(\.jpg)|(\.png)|(\.css)|(\.js)|(\.php)$

RewriteCond %{REQUEST_URI} ^(.*)$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule .* /www.mysite.org.nz/sapphire/main.php?url=%1&%{QUERY_STRING} [L]
### SILVERSTRIPE END ###

Nicolaas

I would try before. Sorry, I cant be of more help here. It is usually easier to contact the ISP - they can help you.