Expression Evaluation Error in Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!gridField

So you only have 96 items in your array and you are trying to get the 97th item using the square bracket approach because of which you are getting this error. 
If you want to get rid of this, try using index() function instead of square brackets as it will let you set a default value when the index is not available. 

So you only have 96 items in your array and you are trying to get the 97th item using the square bracket approach because of which you are getting this error. 
If you want to get rid of this, try using index() function instead of square brackets as it will let you set a default value when the index is not available. 

Thanks for the Reply. I worked