When I try to print from either EMR Datacenter or MyEMR, I get a message asking me to save the file

This means that at some point, your SaaS session lost communication with your local printer.  To resolve this issue, do the following:

1. Close all patients in both programs.
2. Close EMR Datacenter and/or MyEMR® for Windows.
3. Close the EMR Suite Attendant.
4. Double-click the Logoff icon on the desktop or click Start > Logoff.
5. On your local computer, click Start > Devices and Printers, and make sure the correct printer is 'Set as Default'.
6. Log back in to your SaaS account.

Try to print again.  If you still cannot print, follow steps 1 ~ 4, then restart your computer and printer.  Make sure you can print locally then login to try again.