A caution: if RTE needs eg P4F 'Posette', there may be several versions with differing CRCs due updated credits / release info. But RTE will only accept one (1), cannot offer a clue. IIRC, I found a long-lost 'Classic' mermaid tail, had a lot of trouble locating the required P4F version. Yes, after trying several, its match was the original, deep in the legacy P4 run-time in my E: ½TB CAD archive...