- This message is generated by an attempt to set the attributes of a symbol to an invalid value.
- The possible attributes for symbols are Protected, ReadProtected, Locked, Temporary, HoldFirst, HoldRest, HoldAll, Flat, Orderless, OneIdentity, Listable, Constant, Stub, NHoldFirst, NHoldRest, NHoldAll, NumericFunction, SequenceHold, and HoldAllComplete.
- The attributes available in each version of the Wolfram Language are fixed and cannot be changed.
- Off[message] switches off the message; On[message] switches it on. For example: Off[Attributes::attnf].