there is a missing proces replacevar
proc replacevar {strin what withwhat} {
set output $strin
set replacement $withwhat
set cutpos 0
while { [string first $what $output] != -1 } {
set cutstart [expr [string first $what $output] - 1]
set cutstop [expr $cutstart + [string length $what] + 1]
set output [string range $output 0 $cutstart]$replacement[string range $output $cutstop end]
}
return $output
}
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