error

can anyone tell me what this means. sudo port install shorten ---> Verifying checksum(s) for shorten Error: Target com.apple.checksum returned: Could not open file: /opt/ local/var/db/dports/distfiles/shorten/shorten-3.6.0.tar.gz Error: Status 1 encountered during processing. Mack Johnson m_nez_j@mac.com http://macknezjohnson.com