[Ipopt] Hi, gnumex cann't create.def files

[Hycere Hung]

Hi,
I am unable to get gnumex to work. My current setup is:
gnumex 2.04
Windows 7 32bit
MinGW 20111118
Matlab R2011b

When I press "make options file" I get the following error:
 problem creating.def files: extracting symbols from lib-file failed

How to solve it?

Any help will be appreciated.

Thanks,
Hycere Hung
Haisheng Hong
Laboratory of High Performance Computing in Power Systems,
School of Electrical Engineering, Zhejiang University, Hangzhou, 310027,
China.
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