The command itself had gone already, but it was still there in the manual....sorry, I trusted too much the docs and that means I have to check the manual carefully

 -- Massimo

On 1/12/20 7:18 PM, Karl Lehenbauer wrote:
Yeah, that is exactly why. -k

Sent from my iPhone

On Jan 12, 2020, at 09:03, Massimo Manghi <massimo.man...@alice.it>
wrote:

I always conjectured that command "incr0 <varname>" had been
introduced in Rivet as an alternative to 'incr'. In Tcl <= 8.4 this
command failed if the variable whose name is passed as argument is
not set and incr0 simply creates the variable in this case

Starting with Tcl 8.5 command native 'incr' works in pretty the
same way and since we are supporting Tcl >= 8.6 I think we can
safely remove it at least from quattuor

-- Massimo


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