Thank you for stopping by the community to post a question. This community is for Intuit Practice Management users. This question would be better asked here:

Lacerte Community

https://proconnect.intuit.com/community/lacerte-tax-discussions/discussion/02/201

For DMS, I would try and and drag one of the files outside the DMS program to your desktop and see if it opens there. If it does, sometimes if the PDF driver is damaged, we see this issue. I would run the PDF repair tool to see if this helps:

Lacerte Tool Hub: Helping you fix common problems and errors in Lacerte

https://proconnect.intuit.com/community/help-articles/help/fix-common-problems-and-errors-with-the-l...

If this does not work, please post this question in the Lacerte Community. Thank you @George4Tacks for replying!