[flext] dlopen: Symbol not found

[Patrick Gampp]

Hi all,
I built the flext template external with the help of Xcode 4. When I try to create it in a puredata patch, the following error occurs:

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/Volumes/Projects/_shared/pd_X/myext.pd_darwin: dlopen(/Volumes/Projects/_shared/pd_X/myext.pd_darwin, 10): Symbol not found: __ZN18flext_obj_single_d8FinalizeEv
  Referenced from: /Volumes/Projects/_shared/pd_X/myext.pd_darwin
  Expected in: dynamic lookup

 myext
... couldn't create 
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Can you give me a hint, what the problem is here?

Thanks, 
Patrick