i don’t get any error with your patch, osx pd 0.47.1 and 0.46.6… but it also does not seem to write to the array repeatedly (just once) so i have to set the onset first manually. > On 29 Mar 2017, at 13:33, Christof Ressi <christof.ressi at gmx.at> wrote: > > <tcl-error.pd>