During start up/loading of the WmPRT package, the package scans the BPM packages looking for the process fragments and Process Engine passes the name of the BPM package. Afterwards Process Engine reads the models directory and uploads the process models contained there. After the metadata is uploaded, the QoS settings are updated and the process is enabled for execution.

Process Engine uploads the metadata if no metadata exists for the given process key and model version, or if the last modification date of the process file is greater than the deployment timestamp. The timestamp check can handle the case where the model has been changed without changing the model version. As a best practice, always increment the model version when building/deploying an updated process model.

The 'Upload Model' property needs to be enabled for Process Engine to enable metadata deployment. This setting is available on WmPRT home page under Advanced > Upload Model.