---
title: "Process Modifier"
slug: "process-modifier"
description: "Information about the Process modifier."
updated: 2026-04-15T09:38:46Z
published: 2026-04-15T09:38:46Z
canonical: "kb.lasernetgroup.com/process-modifier"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.lasernetgroup.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Process Modifier

**Applies to:** Lasernet Core 11

The Process modifier is used for running external processes. These processes can have data from Lasernet Core as input and produce output that is entered back into Lasernet Core. It is also possible to just run the external process and ignore any data transfer.

## Settings

There are a variety of settings to control the Process Modifier. They are divided into [command line settings](/v1/docs/process-modifier#command-line), [process settings](/v1/docs/process-modifier#process-settings) and [environment settings](/v1/docs/process-modifier#environment).

### Command Line ![Example of the Process modifier configured to run the cmd DOS command with parameters.](https://cdn.document360.io/c831ef63-c6b3-48ee-b443-3e33644e4e2e/Images/Documentation/process-image-impk6c8p.png)

The above example calls the DOS `xcopy` command to copy some files.

As can be seen, JobInfo substitution is available for the command line.

### Process Settings

#### Working Directory

Sets the current directory for the external application. Can be left empty. Can include any number of #JobInfo# references for substitution.

#### Required Exit Code

Which exit code to accept from the application as valid. **Ignore** means that it is not relevant. Lasernet Core will set the ExitCode JobInfo to the actual exit code.

#### Timeout

How long Lasernet Core should wait for the external application to finish. **0** (zero) means that it will wait indefinitely. This setting should be used with care. If the application does not finish, Lasernet Core will appear to hang. If, on the other hand, the timeout is too short, Lasernet Core will not receive the data from the external application before it (Lasernet Core) continues its processing.

Lasernet Core sets the value of the ProcessTime JobInfo to the approximate number of seconds that the process ran for.

### Input Data ![The options in the Input Data list are displayed.](https://cdn.document360.io/c831ef63-c6b3-48ee-b443-3e33644e4e2e/Images/Documentation/process-image-5iw5ky8a.png)

Determines how Lasernet Core should deliver data to the application:

- **Generate File** means that Lasernet Core creates a temporary file with the given **Extension** (the default is **tmp***)*. The filename generated is sent to the application with the `%1` setting on the **Command Line**. Lasernet Core sets the value of the InTempFilename JobInfo to the filename.
- **Use Standard In** means that Lasernet Core sends the data to the application via its `stdin` pipe.
- **None** means that Lasernet Core should not send any data to the application.

### Output Data ![The options in the Output Data list are displayed.](https://cdn.document360.io/c831ef63-c6b3-48ee-b443-3e33644e4e2e/Images/Documentation/process-image-znm9f3kj.png)

Determines how Lasernet Core reads data created by the external application:

- **Read File** means that Lasernet Core sends a temporary filename to the application via the `%2` setting on the **Command Line**. Lasernet Core sets the JobInfo OutTempFilename with the filename.
- **Use Standard Out** means that Lasernet Core reads the data that the application sends to its `stdout` pipe.
- **None** means that Lasernet Core should ignore any data sent from the application.

When reading via `stdout` Lasernet Core sets the StdOut JobInfo to contain any data that was read that way.

## Environment ![The Environment tab of the Process Properties window.](https://cdn.document360.io/c831ef63-c6b3-48ee-b443-3e33644e4e2e/Images/Documentation/process-image-cxrpwzqd.png)

Normally, the application inherits the environment from Lasernet Core, but in some cases, you might want to set the environment yourself. You can do this on the **Environment** page. Each environment value supports JobInfo substitution.