Error message examples
A dot operator must be followed by a name that is a legal identifier. For example in the expression A.Ind Ind must be a literal name. This would access a local index of A with the name Ind at evaluation time.
In your expression, a dot operator was not followed by a valid index.
The dot operator in a.i lets you access a local index
i via an array
a that it dimensions. If a local index identifies a dimension of an array that becomes the value of a global variable, it can persist long after evaluation of the expression — unlike other local identifiers which disappear after the expression is evaluated.
Correct the expression so the dot operator is followed by a valid index.