Non working materialized after exporting DDL with another name than name of source model

I have source model with name "source.xmi" (for example) )and materialized in it.
Then I want to export this model as DDL file. There is default set name of new DLL "exportedDDL.ddl" in export dialog.(Screen2)
After that I want to import this DDL file but new name of source model is "exportedDDL.xmi" and therefore materialized do not work.

Possible solution is that in export dialog will be default set name of source model instead "exportedDDL.ddl" and when user will change name some warning window will show.