Use a screen capture and upload the image to the SP2 beta thread with an explanation of what you were doing at the time including any steps you have to cause the error.
Click on continue and hope the problem goes away. If there's another error, repeat and post up the image to the forum.
Once you are in the route do what you want and note any anomalies and report them including any steps you did to cause the error.
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The errors are called assertion errors. They are a checkpoint or breakpoint that has specific things turned on so that when an error occurs, the message pops up with codes that only the programmer understands.
The more errors we report, the better things are in the future releases. If we don't report them, we have no excuse when something goes wrong because the onus is on us to point out the problems.