pdf

I am working on removing all Flash from a course.  I have several pdf files that I need to include (not to click and open) readable on screen.  When I put the pdf in the course and I preview or upload to LMS, I get an error message that the file can't be found.  I am using Captivate 2017.  I saw a youtube video that said there were previously problems with the files not being found and even when they were in a specific folder (callee), Captivate did not find the pdf file, but, now Captivate has improved and there is no need to try to place the files in a particular place since they are now in the library which is where they should have been.  Is this something new in Captivate 2019?  Thx