Processing .gz files

Hi Team,
While processing .gz files using Cobrix we are getting the error like as follows

There are some files in abc.gz that are NOT DIVISIBLE by the RECORD SIZE calculated from the copybook (3018 bytes per record). Check the logs for the names of the files.

but my abc.gz has only one file. Is cobrix supports .gz file processing? if not can we pass inputstream to cobrix instead of file ?