It would be because the automatic creation of the inspection lot required a stock posting. You must of been trying to create an 01, 04, 08, are similar stock relevant inspection lot. It's why the question was asked of you "What type of inspection lot are you trying to create." It might have given us a cluet to help you.
If OB52 was not configured right, the system can't do any stock movements or postings. You see the same issue sometimes, especially in sandbox systems and development systems when the current posting period isn't rolled over at the end of the month. It would also prevent you from making a UD with a stock posting as well.
But since a manually created inspection lot does not require any stock postings, since all manually created inspection lots are not stock relevant, you wouldn't hit the same error.
FF
