Error codes
ERROR 01 is a syntax error: the expression is not valid. ERROR 02 is a calculation error: a result that is too large, a division by zero, or a value outside the range of a function. ERROR 03 is a nesting error: too many numbers or operations are waiting. ERROR 04 means more than 100 data items in STAT mode. The last three concern matrices and vectors. ERROR 07 means a matrix defined wrongly, or an invalid value. ERROR 08 means dimensions that do not fit. ERROR 10 means a matrix or vector that was never stored.