Details

This message is generated when the indicated expression does not have one of the expected forms.
The expected forms are listed in the message.
Off[message] switches off the message; On[message] switches it on. For example: Off[General::mbrpos].

Examples

The second argument in Developer`PackedArrayQ is expected to match one of the supported array types:

Wolfram Language code: Developer`PackedArrayQ[Range[5], All]

This shows valid arguments in Developer`PackedArrayQ:

Wolfram Language code: Developer`PackedArrayQ[Range[5], Integer]

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