unable to compress ore in a raitaru
Does it have the appropriate service module (Standup Reprocessing Facility I) ? is it online?
yes, its worked for months prior to the patch. and it has fuel too
are you able to reprocess the ore? if not, you probably no longer have access to that service.
yes. its my raitaru and ive tried with a few different toons
the only thing i can think of then, is you’re trying to compress from a ship cargo, NOT station hangar.
that didnt work either 
but i item hanger instead of corp hanger it did. but the corp hanger used to always work
Mimic mentioned that the corp hangar code was changed.