# What is an “INTERNAL SELF-TEST ERROR”?

I got this all the time after updating to 9.0 (OS 10.8.2):

That's Clipboard|c|3015 for the benefit of anyone searching.

The error went away with 9.0.1, but a version has reappeared (multiple times at each launch) since updating my OS (to 10.9):

That's SpanBox|c|2178 for the benefit of anyone searching.

What does an "Internal self-test error" mean?

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I've reinstalled multiple times, rebooted, etc.. I've also contacted Wolfram, both through the reporting mechanism in the "click here" link, and directly through "Premium" support. – raxacoricofallapatorius Dec 4 '12 at 17:17
This isn't specific to version 9. I get them sometimes on version 8. I assume it's a trapped bug or failed assertion, from which Mathematica is able to (gracefully or not) recover, unlike the crashes and freezes, from which it can't. – cormullion Dec 4 '12 at 18:11
I have also been getting these things all the time, doing all sorts of random things. Especially when browsing the Documentation Center. – Eli Lansey Dec 4 '12 at 18:12
@cormullion: I get this in all kinds of circumstances. Even things like just typing Cmd+Shift+F. – raxacoricofallapatorius Dec 4 '12 at 18:14
FWIW, I have gotten Kernels|c|6568 – Eli Lansey Dec 4 '12 at 18:50