Invalid operation: operation
An invalid operation has occurred. The following are some examples of invalid operations:
- A collection was modified while a FOREACH statement was being executed.
- An invalid operation occurred during a Select.
- You specified a Where clause in the Select that contains a join, with a reference to one of the inner tables. A Where expression can only reference the driving (or outermost) table. To apply a filter condition to an inner table, move it to one of the On expressions.