If you have the latest driver installed for the printer then it can be issue with Lightroom's preferences.
So could you please try to reset Lightroom preferences by holding the Shift + option key while launching Lightroom and then try to print.
Please let us know if it helps.
thanks for the tip but unfortunately it didn't help. Same symptoms as before. I noticed that when going through the preferences that the GPU is not being used. Apparently the Nvidia 9400 M is not compatible with this ver of LR. Could that be the problem?
OK, so here is the work around for the above noted problem. It appears that LR will not print DNG files from older macs to older printers. My system is a 2009 MBP and a Epson R1800. Newest software does not help. The work around for me was to convert the pic that I wanted printed to PSD and then they print just fine. JPG also prints fine.