Jules: actually the old runtime folder is labeled "Runtime" and is in J:/Poser Pro 2010/Runtime. I changed the name of the runtime folder to "ALLPOSERSTUFF," and Poser gave me an error that that was not a valid Poser runtime folder. I switched it back to Runtime and Poser opens it up but still gives me that error message when it does.

Jura: thanks for the link. That guy had exactly the same problem and came to pretty much the same conclusion that the error wasn't preventing him from using the program but it was annoying hem. They were unable to figure out what the cause was.

W10, Ryzen 5 1600x, 16Gb,RTX2060Super+GTX980, PP11, 11.3.740