In case others have experienced similar issues...following on from Post #637, lat9 kindly worked with me off-line and we found a resolution

using Firefox's F12 and Control-U functions. Thanks very much to lat9 for her assistance

!
First, lat9 found a coding error where I accidentally omitted a "-" in "-->" in my amended
html_header.php file (commenting out the zcJS function). When that didn't resolve the error, using the same debug methods, I found a bracket error in line 82 of the \includes\templates\My_TEMPLATE\jscript\jscript_framework file. I corrected that and got OPC working

.
This issue may not be relevant to everyone since once OPC started operating correctly, reverting back to the original uncorrected file didn't duplicate the error

. lat9 then provided me with a replacement file.
Thanks again! Very grateful for all assistance!
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