The upgrade process is to Save all the XML files from 1.50, upgrade the image, and then upload the converted devices3.xml file. If you did a “re-upload prior to doing the firmware upgrade” as your post indicates, image 1.50 will not understand the new devices3.xml file format.
If you did not upload the converted devices3.xml file while running 1.50 can you display the devices3.xml file? From the EZSrve Database List window, right click and select Open in New Window. If the devices3.xml file will display, post back the first 4 or 5 lines of the file.
Have you ever been able to Save the devices3.xml file in the past?
Can you Save Target As … the other XML files?
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