Why do I get the error Fread() file ReadSize failure File...

Why do I get the error Fread() file ReadSize failure File boot.bin is not a valid boot image when issuing the burnfile command?

Binary mode was not selected during the FTP session when the files were transferred to the radio. FTP the files again and make sure binary mode is set. Binary mode is set by issuing a bin command at the prompt.

Example: ftp>bin