# tNamedPipeOpen Opens a named-pipe for writing data into it. Used in inner-process communication, tNamedPipeOpen opens a named-pipe for writing data into it. ## tNamedPipeOpen Standard properties These properties are used to configure tNamedPipeOpen running in the Standard Job framework. The Standard tNamedPipeOpen component belongs to the File family. The component in this framework is available in all Talend products. ## Basic settings | Properties | Description | | --- | --- | | Name | Fill in the field with the name of the named-pipe. | | Delete if already exists | Select this check box to avoid duplicate named-pipe. | ## Advanced settings | Properties | Description | | --- | --- | | tStatCatcher Statistics | Select this check box to gather the Job processing metadata at a Job level
as well as at each component level. | ## Global Variables | Variables | Description | | --- | --- | | Global Variables | PIPE\_NAME: the name of the named-pipe. This is a Flow
variable and it returns a string.


PIPE\_NATIVE\_NAME: the native name of the
named-pipe. This is a Flow variable and it returns a string.


PIPE\_OUTPUTSTREAM: the output stream of the named-pipe. This is a Flow
variable and it returns an object.


ERROR\_MESSAGE: the error message generated by the
component when an error occurs. This is an After variable and it returns a string. This
variable functions only if the Die on error checkbox is
cleared, if the component has this checkbox.

A Flow variable functions during the execution of a component
while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl+Space to access the variable list and choose the variable to use from
it.

For more information about variables, see [Using contexts and variables](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/contexts-and-variables). | ## Usage | Usage guidance | Description | | --- | --- | | **Usage rule** | This component is usually used as the starting component in a inner-process
communication Job. | | Limitation | Due to license incompatibility, one or more JARs required to use this component
are not provided. You can install the missing JARs for this particular component by
clicking the Install button on the Component tab view. You can also find out and add all missing
JARs easily on the Modules tab in the Integration perspective of Talend Studio. For
details, see [Installing external modules](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/installing-external-modules).

This component is not supported on macOS.

Prerequisite for Windows users:

To avoid errors when running Jobs that use NamedPipe components on Windows,
complete the following steps:

  1. Download namedpipe_jni_64bit-6.0.0.dll from the Talend update repository.
  2. Rename the file to namedpipe_jni.dll.
  3. Copy the renamed file to the root of the C:\Windows\System32 directory.
| **Related concepts** * [Writing and loading data through a named-pipe](https://help.qlik.com/talend/en-US/components/8.0/namedpipe/tnamedpipeopen-tnamedpipeclose-tlogrow-writing-and-loading-data-through-named-pipe-standard-component-the)