Please post the values of $dir & $prog. Given those values, tell us where the command to be executed lives.

(Nonetheless I will venture into mind reading) By the clue of $Script - basename of script ..., try executing the command with path prefixed as in ... 

...
$prog = join '/' , $dir , $prog;
exec( $prog , ... );

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In reply to Re^3: confused path by Anonymous Monk
in thread confused path by skyworld_chen

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