Did you use the [download] link to get the code? Tab characters are used in the DATA section, plain spaces would break the programme.
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^7: constructing a tree from csv file by choroba
in thread constructing a tree from csv file by zing

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