While trying to gunzip afile I get the following error message

ls -l UK_US_02310.dat.gz
-rwxrwxrwx 1 imis abint 348854527 Jan 8 00:17 UK_US_02310.dat.gz

gunzip UK_US_02310.dat.gz

gunzip: UK_US_02310.dat.gz: invalid compressed data--format violated


I can gzcat the file and pipe to a file but it coredumps after 230k of records . I know there are 12952988 records in file

Is there anyway of fixing the file or extracting the data minus the corrupt part or have I lost all the data