You probably need to chomp the line-termination sequence off that user input. Try 

$t = <STDIN>;
chomp $t;  # removes trailing line-termination sequence
# ...
system( "$t$i.bat" ) == 0 or die "system( $t$i.bat ) failed: $^E";

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the lowliest monk

In reply to Re^3: concatenating strings by tlm
in thread concatenating strings by imperl

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