500 Internal server error - STILL NOT SOLVED!

[eluser]cideveloper[/eluser]
where is this .htaccess file located? Is it in /home/folder1/public_html or /home/folder1/public_html/abc?

I ask this because your setup from the sounds of it looks like this.

You have a server with an IP address. Many domains are pointing to it thus it is a virtual host setup on apache. One of the domains pointing to it is abcdev.com.au thus you will have a VirtualHost set up in httpd.conf for the domain abcdev.com.au

If the .htaccess is in the /home/folder1/public_html/abc folder you should only need the below

Code:

RewriteEngine on
RewriteCond $1 !^(index\.php|assets|robots\.txt)
RewriteRule ^(.*)$ /abc/index.php/$1 [L]

From the sounds of it you just have a folder in wrk teams dev server main folder.

One last thing. Can you post your config? sometimes there is a glaring problem in that file that may cause this issue.