[plt-scheme] get-module-code: cannot use extension file

Hi,

When trying to create a compiled or distribution executable from Scheme code, I get the following error:

get-module-code: cannot use extension file.

Does this mean that I can't create compiled or distribution executable that contains  C (MzScheme Extension) code? Could anyone tell why? Will it be improved in the future? Many thanks.

Sincerely,
Chongkai