Upgrading ThingWorx Navigate > Migration Upgrade > Install a PTC Windchill Patch
  
Install a PTC Windchill Patch
For Windchill versions prior to Windchill 11.1 M020 CPS 15, an enablement patch must be loaded onto the Windchill server to enable the PTC Windchill Extension for ThingWorx. The patch must correspond with the Windchill release you have installed.
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You can skip this if you already installed the Windchill Patches.
The required PTC Windchill patch adds several web service endpoints that allow ThingWorx to interact with Windchill.
The Windchill patches are found in the following locations:
For ThingWorx Navigate 8.5.3 and Windchill 11.1 M020—Download the PTC Windchill Extension 1.12.4 bundle from the PTC Software Download page and install the respective Windchill patch of 11.1 M020.
For all other versions of ThingWorx Navigate—Install the patch from the ThingWorx-Navigate-Release-<version> that you downloaded and extracted in Upgrading ThingWorx Navigate.
The name of the ZIP file identifies the release in which it should be installed. For example, on a 11.1 M020 system, install the patch in 11.1-M020_WCTWXExtension_{version}.zip.
Each patch includes instructions specific to the release. To install the patch, unzip the file and use the instructions found in the Readme file included with the patch.
For more information about the supported Windchill versions and patches, see the Platform Support Matrix for ThingWorx Navigate.
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Make sure you reapply the patch after every update of Windchill CPS.