The problem is with

"-o $temp_iso_file"
# and
"-V 'Usage Reports'"

[download]

These are two parameters and you should pass them as two:

"-o", $temp_iso_file
"-V", "Usage Reports"

[download]

This also removes the need for the quoting of some of your parameters.

In reply to Re: Quick mkisofs question by Corion
in thread Quick mkisofs question by gnubbs

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