((: 08: value too great for base (error token is "08")

Here is the code that caused it for ((track=1;track <= $number_of_tracks;track+=1));do

Also in each iteration "track" is padding with zeros using: track=`printf "%02d" $track`

It doesn't happen until you pass 8 to it, if you pass 1,2,3,4,5,6 or 7 it works fine.  I read this is because it sees these numbers as octal numbers (it as in many progamming languages and also the BASH shell).

bash, token, quot, number_of_tracks, iteration, padding, zeros, printf, doesn, octal, progamming, languages, shell,

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