mark@hyper.UUCP (Mark Mendel) (07/08/86)
> > Sometimes when I binhex a file that has come over the net I get > a message about a crc error. Can anyone save me a lot of time by explaining I, too, have experienced these errors. I believe they are caused by the file being transferred at some point using a CHECKSUM instead of a CRC. I know of at least one case where this must have been the problem. The BOSTON II font distribution had a CRC error. I looked at the fonts, and LO!, several characters had double bit errors. That is, a localized burst of errors where in nearby bytes the same bit was wrong s.t. a checksum will not detect the error. These are precisely the types of errors that CRCs are designed to catch. I have read articles where people say "checksums have always worked for me...". Well, 99% IS NOT GOOD ENOUGH for a transfer protocol! If you are going to be posting stuff, please try to use an terminal package that supports CRC. -- ------------------------------------------- Mark G. Mendel, Network Systems Corporation ihnp4!umn-cs!hyper!mark