Details

This message is generated when the indicated expression is not a valid context specification.
A valid context specification is a string that ends in a backquote character, starts with a character that is not a number, and does not contain any operator characters.
Off[message] switches off the message; On[message] switches it on. For example: Off[General::cxt].

Examples

The argument string ends in a forward quote character rather than a backquote character:

This shows a valid context specification:

Restore the original context:

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