Thank you Bill and Patricia. It's helpful to get confirmation from multiple references, when we are not able to replicate a problem, to identify what a problem might be and what this issue is not.

I asked about the SSIPDF.DLL version in case someone was attempting to print a form from the PDF Viewer. Since the issue is strictly the report printing, then the SSIPDF.DLL file is not involved and we don't have to follow that branch anymore. Nor the version of Adagio ePrint.

That other workstations have no problem, and one (or more) workstations do, then that information leads to something particular on the workstation interfering with the process of (e)printing reports, that exists on that workstation and not the others. I would say that you have confirmed my thought that the AdagioPDF printer driver Profile not getting cleared is due to the report not completing successfully, and does get cleared upon successful ePrinting.

Bill: For the workstation having a problem, does this share the same (network) printers as other workstations, or is it a locally attached printer, with different default printer drivers installed than other workstations?

To the best of your knowledge, do all reports have this problem? Or just some? What about say a company profile report?

You may be aware of a couple of other threads on the support forum where specific reports are printing to an expected tray, such as AR batch listing reports, depending on the type of printer in use. I'm curious if what you are seeing is a different symptom where ePrintng specific reports is still reading the saved printer name from the Crystal RPT file, rejecting what it finds, and trying to print when it should be generating a PDF. My suspicion is that all reports will exhibit the same behaviour, but I thought this was worth mentioning.
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Because there are multiple determinations of this, there is something happening. But since this is very likely to be environment/workstation/printer related, it may prove to be difficult to track down, especially if we are unable to replicate a problem.