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How to: Set a Custom Log File Location for ClickOnce Deployment Errors

ClickOnce maintains activation log files for all deployments. These logs document any errors pertaining to installing and initializing a ClickOnce deployment. By default, ClickOnce creates one log file for each deployment activation. It stores these log files in the Temporary Internet Files folder. The log file for a deployment is displayed to the user when an activation failure occurs, and the user clicks Details... in the resulting error dialog box.

You can change this behavior for a specific client by using Registry Editor (regedit.exe) to set a custom log file path. In this case, ClickOnce logs activation successes and failures for all deployments in a single file.

Caution noteCaution:

If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Use Registry Editor at your own risk.

NoteNote:

You will need to truncate or delete the log file occasionally to prevent it from growing too large.

The following procedure describes how to set a custom log file location for a single client.

To set a custom log file location

  1. Open Regedit.exe.

  2. Navigate to the node HCKU\Software\Classes\Software\Microsoft\Windows\CurrentVersion\Deployment.

  3. Set the string key LogFilePath to the full path of your preferred custom log location.

    This location must be in a directory to which the user has write access.

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