Unloading a plug-in through MEL is simple—you
use the unloadPlugin command
and supply the plug-in name.
Note
A dynamic
library plug-in must be unloaded before it is recompiled. Failure
to do so causes Maya to crash.
Before
you can unload a plug-in, you must first remove all references to
it from the Maya scene. Along with deleting nodes from the scene
that are defined in plug-ins, it is also necessary to flush references
to deleted nodes and executed commands from the undo queue. Even
though the artifacts are no longer in the scene, they are still
there for undo purposes.
If
you force the unload of a plug-in while it is in use, it will not
be possible to reload node plug-ins. This is because existing nodes
in the scene will have to be converted to “Unknown” nodes, and on
plug-in reload, you will not be allowed to change the type of these
existing nodes.
The
loadPlugin/unloadPlugin commands have been extended to work with
scripted plug-ins.
