Details

This message is generated when the tag for an assignment appears within an Alternatives pattern.
Assignments for tags within Alternatives are not supported. The same effect can be achieved using separate assignments.
The notation p1|p2|p3 is equivalent to Alternatives[p1, p2, p3].
When this message is generated, the assignment is not made.
Off[message] switches off the message; On[message] switches it on. For example: Off[General::altno].

Examples

The assignment tags occur within an Alternatives pattern on the left-hand side of the assignment:

Wolfram Language code: (f1 | f2)[0] = 0

Rules for these symbols can be introduced using separate assignments:

Wolfram Language code: f1[0] = 0;f2[0] = 0

Wolfram Language code: {f1[0], f2[0]}

Clear the rules:

Wolfram Language code: f1[0]=.;f2[0]=.

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