Script error message in a single line

I am executing the command mv /prod/new/outputlog/error.log /prod/hist/new/outputlog/error.log.32423423424 using shell script. Since the error.log file is not available the command writing an error message in to the log file automatically. The error message mv: cannot rename /prod/new/outputlog/error.log /prod/hist/new/outputlog/error.log.32423423424 Not wrap in to two lines. Since it is a system-generated error message I am unable to control the length of the error message for each line. I want the system to wrap the message after it reaches length 80.