References are redundant

Dear Sir:

I began to use MHonArc v2.3.3 last night.
I found that references of an archived file are redundant sometimes.
Although you remove the redundant references in
$(MHonArc)/lib/mhamain.pl (l: 802), it meets with failure.
Because the variable refs is declared as a `my' variable in
$(MHonArc)/lib/mhamain.pl (l: 676).

Yours sincerely,
Manabu Nakamura