This message is generated when the positions specified in the second or third argument of Subscripted are not available in the expression in the first argument.
The second argument in Subscripted identifies the elements in the first argument that should be formatted as subscripts and the third argument identifies the elements that should be formatted as superscripts.
Off[message] switches off the message; On[message] switches it on. For example: Off[Subscripted::subx].
Examples
Basic Examples(1)
An error occurs because the second argument in Subscripted specifies positions that are not available in the first argument:
This shows a valid subscript specification for this expression: