What is error 13206 when loading a plugin?

[TheVork]

Look here?

Some plugins won't load or folder is not found?

Strangly enough some plugins won’t load, nor the folder won’t even be found. Grace sampler for example. When I try to add it manually I get an error. Failed to load plugin (error code 13206)

or
http://forum.synapse-audio.com/viewtopic.php?f=1&t=12005&sid=5aee4a4d7b848798dede52a1535479ab

Maybe it helps a bit.