After the computers were moved around, the one connected to the Modela was having problems communicating with it. I called Roland's Tech Support and they first told me to:
- right click on My Computer
- select Properties
- select Hardware
- select Device Manager
- select ports, then double-click on COM1
- go to port settings and double-check that "flow control" is set to "Hardware".
It was set to Hardware on our machine, so that was not the issue.
Next, they told me to click on Resources in the same com1 window, and then pull down the menu for "Setting based on:" and choose "Basic Configuration 0001".
That solved it! Dr. Picza works now!