Feature Request: throwing an exception when assigning to the CONSTANTS hash

Apologies again: but this message has no useful content! Feel free to 
nip out for a coffee or stay in and watch a grown man slowly master a 
subject line:

... well that was closer but not the follow on hoped for. Guessing the 
missing element is the [Templates] prefix although that was not part of 
the original subject.

I will be disappointed, but not surprised, If this starts a new thread,  
"[Templates] [Templates] Feature Request: throwing an exception when 
assigning to the CONSTANTS hash"

Thank you for your patience and regards,

David t