Aggregate error when compile

[tonnot]

I now that it is low information, but anybody can explain me what can be this error:
aggregate 'Wfile::WFileUtiles wfileutils' has incomplete type and cannot be defined

[Mazd]

Where have you got that error?--be open please,someone may think it's Constructor definition error but...am not sure

[tonnot]

ok, I think is this .
Thanks