The third attempt with software only rendering also failed although after several minutes. This time there was no popup error message but the status in the Queue window shows Failed with a yellow triangle. Clicking the triangle pops up an EncodingErrorLog that only sais the encoding time (14:53 minutes) along with an Export Error. Error compiling movie. Unknown error.
Hiding in the background was a Computer Low on Memory error. not sure when this came up. I have now gone into the preferences and changed the available memory down to 4GB or 50% of total memory to see if that helps.
Any other suggestions?
Schwizer