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Incorrect context for indexing into a shelf.
Additional Information
X selection is not allowed with the 'Y' action.
where X is item or key, and Y is clear,
new, REPEAT OVER, save or
save-clear.
or
X selection is not allowed with the 'Y' condition.
where X is item or key, and Y is 'has
key.'
or
X selection is not allowed in conjunction with 'NUMBER-OF'.
where X is item or key.
or
The IS SPECIFIED attribute test cannot be combined with an ITEM
selection.
or
The 'X' stream cannot be indexed with 'Y' selection.
where X is output, #output, or markup and Y is
item or key.
or
The 'X' is a scalar shelf, and cannot be indexed.
where X is the name of a counter, stream, or switch.
Explanation
The item phrase may be used only where it makes sense to work with one particular value of the shelf rather than the complete shelf. Only a complete shelf, not part of it, can be cleared, added to, repeated over, or saved.
