I deleted both and furthmore ALL other definitions in the Extension and I made new Definitions with different names.
After I created new extension, I tested extension and it worked very well. After, I close Vassal main Program and reboot vassal mail program and extension pieces seem not meet the name of definition and they are show as they as no Definitions in prototype Trait.
I tried twice with the same result as describe above
I have started a new extension but problem remains
Update:
Module appears stable after I elimminated Folders with same names