in reply to [SOLVED]: Using glob in file test gives "Use of uninitialized value in -e" warning.

Congrats on 'use warnings'!

The error is coming from: 

if (-e glob '/abc/def/ghi/test*') # line 4

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For the case where the 'glob' returns an empty array undef (i.e. test* does not exist).

You should break that into two tests: 

my @tests;
if (@tests =  glob '/abc/def/ghi/test*'  and -e $tests[0]) {# line 4

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