[SOLVED] 500 Server Error

I am having a problem with accessing any pages on my OpenCart Site other than the home page and the admin panel.

I get an unspecified 500 Server Error on all pages but nothing is in the Error Log.

I have one Theme and one Extension installed, but I am not sure that this is the problems as everything was working OK when I went to bed last night, but I am getting this error this morning.

I had something similar before and created this new install in a sub directory.

I have since moved this install into the root as it was working and had worked since moving it.

I seem to have stopped the 500 error by renaming the sub directory install back to its original name.

I have noticed that the individual products are still linking back to the subdirectory.

I have changed the paths in the two config.php files to use the root directory

Is there another setting that needs to be updated?

Solved it - I thought I had changed the base url in .htaccess but on checking it still needed updating