Heat Maps irule by Colin.

I haven't read through the iRule fully enough to understand all of the logic. But I think the immediate cause of the runtime TCL error is that $friendlyURL is null. It looks like this would happen if the URI was just forward slashes (one or more), as those are getting removed when saving the $friendlyURL variable here:

 

 

Strip slashes from URI to allow easy queries

 

set friendlyURL [string map {/ ""} [HTTP::uri]]

 

 

Aaron