The client issued the LIST or NLST command to list files in a z/OS® UNIX directory. While processing the cmd command, the server issued the C run-time library routine popen(), which did not complete successfully. error is the error message returned by the C run-time library.
The cmd command is rejected. The server waits for the next command to be entered by the client.
Reissue the command. If the problem persists, contact the system programmer.
Correct the problem indicated by error.