This InDesign design-time message means that the diary generation options of your script are set to convert the output file to PDF at the end of diary generation, but that the specified InDesign PDF export preset does not exist.
Solution 1
Select the Change Diary Generation Options from the suggested solutions pop-up menu, and select another PDF export preset.
Solution 2
Alternatively, if the selected preset was recently created, you can use the PDF menu's update list of pdf presets command
Topic 185930, last updated on 14-Jun-2021