ایران شهرساز

وقتی میخوام از خطوط ارتفاعی DEMبسازم این خطا رو نشون میده میشه راهنمایی کنید چیکار باید بکنم؟ Error code: 010067: Error in executing grid expression. Description: There was a problem executing the map algebra expression. Solution: Check the syntax of the function and ensure that you are correctly specifying all of the required and any optional parameters. Be sure to check that the data type is correct. For example, specifying a character string in the command when a numerical value is expected may cause this error.