cocreator

I don't see a place to delete this, so I'll just say I've solved the problem. Thank you anyway. I've created several images, as part of a book, in paint.net. Within paint.net I converted each page to a PDF file. I am now trying to combine them all as a single document in Adobe Acrobat. On the very first PDF file I uploaded, it said that it "failed". Has anyone else ran across this? Has anyone tried to do this exact thing?