We have used plug-ins in process model (both Appian and custom developed plug-ins), now couple of plug-ins are depreciated. Now, we have a challenge to identify which process models has depreciated plug-ins. Is there any Appian functions OR mechanism to identify which process models has depreciated plug-ins.
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Agreed to @Robert statement, there no such direct/automated way to search/find for a plugin used inside the process model.
As of now, the best option is to, search for the plugin name using Notepad++ or any other text editor inside list of exported XML files of your process models.
Currently we can only search for the expressions used within the objects but not the plugins.
Hence you need to put some manual efforts to achieve this.