Ok I found the reason. There was a armor part 9 in slot 3 of the processor. After I removed it the process worked. Was suprised because normally it doesn't matter as long as the summary TL lvl of all the trash in the processor fits. I know that it is important to put in the tool first and then the item you want to recycle. Seems like the armor part 9 wasnt high enough but I had 5 armor part 10 with it.

Sorry for the confusion