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Error

Hello,

after the command i get this error message:
Could somebody please help me with that?

sudo ./check_dell_ups.pl -H 192.168.2.4 -C public -T serial_number
Possible unintended interpolation of @o_attrL in string at ./check_dell_ups.pl line 663.
Global symbol “@o_attrL” requires explicit package name at ./check_dell_ups.pl line 663.
Unmatched ( in regex; marked by