Error codes for the SERIES command.

• 1: can not determine series expansion for $\arctan(x)$ function with current argument x.
• 2: $\arcsin(x)$ not defined for infinite argument.
• 3: no series expansion for $\exp(x)$ at $x=\infty$ if sign is unknown.
• 4, 5, 6, 7: failed to compare 2 variables.
• 8: can not determine order for the current rest.
• 9: negative argument for logarithm function.
• 10 (<Ah>): insufficent order. (You can try again with a larger order)
• 11 (<Bh>): can not find sign of argument of ABS function
• 16 (<10h>): numeric input are not allowed