int returnCode = SUCCESS;

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That looks like C code, not Perl code.    Perhaps you meant: 

                    my $returnCode = SUCCESS;

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                        if ( $returnCode != SUCCESS ) { return $return
+Code; }

                         return $returnCode;

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That makes little sense.    You are testing $returnCode but you return $returnCode whether it equals SUCCESS or not.

In reply to Re: Can't modify int in scalar assignment error by jwkrahn
in thread Can't modify int in scalar assignment error by rkrish

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