Problem with dmd 2.068 Win 32

[MGW via Digitalmars-d-learn]

Hi!

My project has an error link:
Error 42: Symbol Undefined 
_D6object9Exception6__ctorMFNaNbNfAyaAyakC6object9ThrowableZC9Exception

On dmd 2.067.* everything gathered without mistakes. Where to 
look for a mistake?