---
title: "Tracker 4 command line options"
canonical: "https://help.vicon.com/space/Tracker41/14323411/Tracker%204%20command%20line%20options"
format: markdown
---
Tracker supports the following command-line options that control functionality.

| **Option** | **Effect** |
| --- | --- |
| `--help` | Show a dialog listing the available command-line options. |
| `--log arg` | Set default log level to one of [`Off, Always, Error, Warn, Info, Default`, or `Debug`]. The default value is `Default`.<br>Setting to `Off` turns off all logging. Other options enable logging at that level of priority or higher.<br>For example, at `Default` level, messages at levels `Always, Error, Warn, Info`, and `Default `are logged to file.<br>Unless the **Advanced Options** panel is shown from the Log context menu, the Log view in the application always hides messages at levels `Default` and `Debug`. |
| `--crash-handler arg` | Set the crash handler [`omg, quiet, system`]. The default value is `omg`.<br>`omg` - Use the OMG Error Reporting tool to send a report to Vicon support (requires internet access)  
`quiet` - Suppress any error dialogs on crash, and save a report to *C:\Users\Public\Documents\Vicon\ErrorReporting*  
`system` - Default Windows handling of crashes |
| `--terminal-port arg` | Set the port to use for the Vicon Core API terminal server. The default option is `52800`. |
| `--log-dir arg` | Set the directory to use for log files. The default value is `C:\Users\Public\Documents\Vicon\Tracker4.#\Log` |
| `--max-log-files arg` | Set the maximum number of log files to keep. The default value is `20`. |
| `--system-ip-address` | Set the host IP address to use for the Vicon system. The default value is `192.168.10.1`. |
| `--no-version-prompt` | Suppress prompt to update if not running the latest application version. This may be useful when running as a headless service. |
| `--no-splash` | Suppress the application splash screen. |

For example, to save a maximum of 100 log files to *C:\TrackerLogs*, run Tracker with the command:

"`Tracker.exe --log-dir=C:\TrackerLogs --max-log-files=100`"