Error, invalid function arguments - Maple Help

Error, invalid function arguments

 Description This is a 2-D math parser error. It is generated when a function call (that is, a structure of the form name(arguments)) is built incorrectly.

Examples

 > $f\left(x,,y\right)$
 $f{}$

This example uses incorrect syntax (two commas between the arguments) for a function call, and therefore Maple cannot determine the function arguments.

Solution:

To fix this error, use the correct syntax for a function call. The arguments must be in the form of a sequence.

 > $f\left(x,y\right)$
 ${f}{}\left({x}{,}{y}\right)$ (2.1)
${\text{}}$