Droplet giving errors

I have not used this feature for some time, but definitely not invoked from the develop presets panel: the sequence as I recall it was to run an Export batch, in the settings of which the droplet is selected as Postprocessing operation. So that whole setup might usefully be saved as an export preset.

LrC then exports each image in turn, tells PS to open that and run whatever named PS action was encoded into the droplet; then carries out whatever further saving (of the result of the action) is programmed into the droplet options, then LrC moves on to the next image and the postprocessing sequence repeats for that.

This all might I suppose now fail to work if e.g.: the exporting destination / its user permissions now not valid; the droplet referenced by the export preset is no longer available to LrC; the way the droplet invokes PS is now not working - perhaps because the version or program executable location has changed meanwhile; the PS action originally referenced by the droplet is no longer found by PS; the re-save destination / its user permissions not valid.

Hey @jengreer, 

Welcome to the Lightroom Classic community! I wanted to confirm — are you trying to use an action created for Photoshop in Lightroom Classic as a preset? If so, then yes, the error you're seeing is expected. Lightroom Classic and Photoshop use different systems for applying edits: Lightroom uses presets, which are sets of predefined adjustment settings, while Photoshop uses actions, which are sequences of recorded steps or commands. These aren't interchangeable across the two programs.