asterisk users - Aug 2011 - Version 1.8 strange expression error

This expression that worked fine in 1.6.2 is returning an error:

exten =>_X.,n,Set(i=$[${i} + 1])

It needs to add 1 to the value if "i". Did I miss something?

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of CDR
> Sent: Monday, August 08, 2011 9:42 AM
> To: asterisk-users at lists.digium.com
> Subject: [asterisk-users] Version 1.8 strange expression error
> 
> This expression that worked fine in 1.6.2 is returning an error:
> 
> exten =>_X.,n,Set(i=$[${i} + 1])
> 
> It needs to add 1 to the value if "i". Did I miss something?
Showing us the actual error message might be helpful.  Also, add a exten
=>_X.,n,Noop(i is ${i}) and show us the CLI output.