This particular error is listed as “FPCP Signaling NAN”.
Translated, that means: the Floating Point Control Processor (FPCP) encountered a number that was “Not A Number (NAN)”.
The way that the computer stores decimal numbers is a bit strange. It breaks the number apart and stores it in 3 pieces:
1) Whether the number is + or -;
2) The number without its decimal point;
3) A Multiplier;
All of these things are first translated to Base 2 from our more familar Base 10 numbers.
Because of the process, it is possible to set up a pattern of ones and zeros (the way that information is stored in the computer) that cannot be translated back into a decimal number. When that happens, the computer indicates that a “NAN” error has occurred.
The error could indicate that your System file is corrupted.
What to do
If you suspect that the System file is corrupted, try re-installing it. If that fails to solve the problem, you are probably having a hardware failure. The System file can appear to be corrupted because of bad RAM or a bad disk. These possibilities can only be evaluated with certainty by an Apple Repair shop. Consider having your system examined if you don't feel capable of doing it yourself.
