Returned when a specified pipe name is considered invalid by the operating system. A pipe name must adhere to the naming rules of the operating system where it is used. On a Windows platform, the pipe name must be less than 256 characters in length, and must not contain any of the following symbols:

\ ? | > < : / * "

On a UNIX system, the pipe name must be less than 256 characters in length. Almost any character can be used in a UNIX pipe name, but it is recommended that names be limited to alphabetic characters, numbers, periods (

.

), underscores (

_

), and dashes (

-

).