Anyone using sugarvar memberName

I am not able to get the following to work in custom fields.

I created a custom field for QRCode and created a TPL file for it:

I am planning to use the product url field for the QR code and thus have done the following:
{{sugarvar memberName=‘url’ key=‘value’ string=true}}

If I remove the memberName=‘url’ field, I get the contents of the field that I am using; I would like to reuse the url field instead of editing another field.

Any suggestions?

Here is the error in the apache log:

PHP Fatal error: Smarty error: [in cache/modules/AOS_Products/DetailView.tpl line 427]: syntax error: unbalanced parenthesis in if statement (Smarty_Compiler.class.php, line 1268) in /var/www/html/suitecrm-7.1.2-max/include/Smarty/Smarty.class.php on line 1095, referer:

This is not something I have used before.

Are there examples on the sugar forums that may help?