Email templates were introduced in version 1.2.16, I've belatedly discovered.  This has given me some grief. The original templates for order notification emails have not been removed.  So I naively thought, not having realised that these new templates had been introduced, if I edited these old templates I'd see the result in the generated emails. How wrong I was. Even if I inserted error_log's in the these templates, the 'error' message would come out, so I knew the template was being executed, but the HTML around error_log did not appear in the email (tearing of hair)!  Following the code for emails pointed me to the new email templates.  Serves me right, you might say, for not reading the release notes, but why keep the old templates, and load them?  The release notes also announced the new editor of these templates in the Control Panel.  Great! - or was it. I needed to change the column heading 'Model' to 'Author' - our shop sells books - simple enough in this editor, although a placeholder would have been useful.  When I did that the result was catastrophic. Here is a portion of the HTML produced:

<th class="align_left" style="color: #ffffff;">Author</th>
<th class="align_right" --n--="">       style="width: 10%; padding: 0.3em; color: #FFFFFF;"&gt;Price</th>
               <th class="align_right" --n--="">                style="width: 15%; padding: 0.3em; color: #FFFFFF;"&gt;Quantity</th>

My new Author line was OK, but the following lines had this extra text inserted after the "align_right".  I think what is happening is that because the <th...> tag was split over two lines, the editor has inserted this
--n--"">   What's more, the end ">" has got converted to  &gt;
The work-around is to delete the newline and keep the <th > tag on one line even it wraps around, and change the &gt: to >

In fact I found this has happened at a number of places in the template file.

I have recently started getting this Internal Server Error message coming up every time a new page is loaded in the AbanteCart control panel:

"Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at webmaster@xxxxxxx to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request."

I've read the earlier reports of this error, but none of the suggested solutions work for me. No error messages appear in the error log. In the host control panel I do get messages like:

[Fri Dec 09 07:44:41.692159 2016] [:error] [pid 343660] (12)Cannot allocate memory: [client a.b.c.d:55086] couldn't create child process: /opt/suphp/sbin/suphp for /home/txxxxxe/public_html/index.php, referer: hhhh://txxxxe.org.uk/index.php?rt=setting/setting&active=system&store_id=0&s=admin123&token=K6goZgEZJezJ9nKKJJd0MVniO9hhEJgY

Additionally, host control panel resource usage shows that virtual memory usage has shot up to their maximum of 1024Mb although physical memory does not go above 30Mb.   My php.ini memory maximum was put up to 1152Mb for a time (!) but this had no effect. I was still getting these orange error messages, sometimes two for a new page.

Image sizes in the resources/image directory are no more than 603kb.

I wondered whether my recent addition of a new extension may have been responsible so I uninstalled and deleted that one, plus one I had modified substantially, and moved the files away from the extensions directory.  No joy.

Can you suggest anything?

Thanks.