Error: EDA Netlist Writer failed to generate FPGA Xchange fi

[blakaxe@gmail.com]

I have successfully compiled a design in Quartus 2 .
Now I use the EDA netlistwriter to generate an FPGA Xchange File.

and i get the following errors

Error: EDA Netlist Writer failed to generate FPGA Xchange file
Error: Error(s) found while running EDA Netlist Writer

But there are no messages to tell why these errors occured?

Has anyone faced this issue before?
Am i overlooking something trivial?

By the way i could generate a .fx file for another design. But it does
not seem to work for the current design.

Thanks