The error messages should indicate what the problem is. See the error message list in your calculator's user's guide for more information.
Ma ERROR or Math ERROR
Cause: The calculation result is outside of the allowable calculation range or you are trying to perform an illegal mathematical operation (such as division by zero).
Action: Check your input values and adjust them to allow the calculation result to be within the allowable range. If you are using memory for your calculation, make sure that you check the memory value.
Syn ERROR or Syntax ERROR
Cause: The calculation expression is the wrong syntax, or the program you are using contains a syntax error.
Action: Press the or key to display the location of the error, and correct it.
Stk ERROR or Stack ERROR
Cause: The calculation you are performing has caused the capacity of the numeric stack or the command stack to be exceeded.
Action: Simplify your calculation expression. You could also split your calculation expression into two or more parts and execute the parts separately.
Cause: You executed a matrix, graphing, or some other operation that caused remaining memory capacity to be exceeded.
Action: Delete memory data you no longer need. Make sure that the number of variables used in your expression does not exceed the number of variables that are available.
Other error messages may appear to let you know that a calculation you are trying to perform is not compatible with your current mode, angle unit, display, or other setting. If this happens, check the setup of your calculator and try again.