Under the Output option, you sent output to a command or program through a pipe. Although the pipe was established (indicating that the command had correct syntax and named existing programs), it has since closed unexpectedly. This condition indicates that the (first) program in the pipe terminated before it had received all the output. Possibly it quit due to an error, or possibly you or another user terminated it with a kill command. Look for messages from the pipe program that might explain why it quit.