The transfer of data ended because of an error in the block header of the data. The FTP server tried to delete the data set because the current CONDDISP is set to delete the data set when file transfer errors occur.
Processing continues.
Change the CONDDISP setting with a SITE command if you do not want data sets deleted when file write errors occur. See the z/OS Communications Server: IP User's Guide and Commands for information about the SIte subcommand.
Get a trace of the store operation and contact the IBM® Software Support Center.