Unbound atom-space symbol

space.unbound

Message

Unbound atom-space symbol '<name>'.

What it means

A named space such as &kb is referenced but never bound. bind! creates a token explicitly. A running import! also binds its first argument to the imported module space.

Why it happens

The space name is misspelled, or the bind! or running import! that creates it is missing or out of scope.

How to fix it

Bind the space before use, import a module into that token, or reference the correct name. Use &self for the current space.

!(match &kb ($x) $x)   ; space.unbound: &kb was never bound

Both forms below make a token available:

!(bind! &kb (new-space))
!(import! &module-kb knowledge)

Controlled by the metta.diagnostics.unboundSpaces setting.