For anybody looking at a sudden crash around 200 turns or so, you can use the following method to update your save files to reset your robot's ages back to 0. It's purely a band-aid workaround that is fixed in the next release:
Open up your save game file in any text editor (notepad++ is my recommendation as it handles newlines properly). Look for similar lines near the very bottom of the file:
<robot id="2" type="1" age="195" production="1" x="37" y="80" depth="4" direction="5" />
For each robot, change the field
age="XXX" to
age="0". Your ages may vary but this defect is related to improper handling of 'dead' robots. If this doesn't fix your crashing, please open up a new thread with as many details as you can provide to replicate your issue.
As a final aside, I split this thread into a new topic with an updated title.