Hi. Your code worked a treat, thanks Grandfather. As regards to the ordering of the arrays .. advice duly noted. In this case, the files are called something along these lines: 
nameoffile012298.txt

[download]
etc .. so for one file in one directory there is a corresponding file with the exact same name and number in the other directory. Seems to be working without the need for sorting right now but I shall be watchful :)

In reply to Re^3: passing number of files in directory to subroutine by Angharad
in thread passing number of files in directory to subroutine by Angharad

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