OCR a converted file - but still need to save it first, why?

In short this is the scenario:

r-click a file (e.g. a jpg) and select conver to PDF

Acrobat opens and shows the file (as PDF)

then I start OCR this file

(Created an action and added it as button to the toolbar)

Action is to handle the 'Current open file'

However, running my 'OCR this file'-button prompts me to save the open file first: the 'Files to be processed:" box remains empty.
Maybe.. because the converted file needs to be saved first(?)

Could not figure out how to have :

a. Convert file to PDF automatically save the file (alongside the source) - after converting CTRL-S still prompts for file name

b. have the file in the 'Files to be processed' box

Any suggestions?

FWIW I have added some screenshots.

Thanks!