comsol3.5a 3D AcoSolid3特征频率求解时遇到的error

fhyd212

error如下：

??? Java exception occurred:
Exception:
com.femlab.jni.FlNativeException: Failed to evaluate variable jacobian
Messages:
Failed to evaluate variable jacobian
- Variable: pconstr7

Extrusion coupling operator interpolation failed
- Geometry: 1
- Boundaries: 10,15,23,34,52,61
- Destination coordinates: [-0.015; -0.005508663163971558; -0.015], [-0.015;
    -0.004913565773184822; -0.015], [-0.015; -0.004115198662323831; -0.015],
    [-0.01452243223274522; -0.005293405346702834; -0.015], [-0.0145829396484911;
    -0.004622735548643516; -0.015], ...

Stack trace:

at elcplextr.cpp, row 584, ()
at elcplutil.cpp, row 2027, ()

at com.femlab.solver.FlSolver.femEig(Native Method)

at com.femlab.solver.FemEig.run(Unknown Source)

at com.femlab.server.FlRunner.run(Unknown Source)

at com.femlab.server.q.run(Unknown Source)

at com.femlab.util.i.run(Unknown Source)

at com.femlab.util.aa.run(Unknown Source)

Error in ==> femsolver at 368
solobj.smartRunner(report, loopTime);

Error in ==> femeig at 61
varargout = femsolver(mfilename,'FemEig',varargin{:});

Error in ==> fcc_2 at 197
fem.sol=femeig(fem, ...
现在的问题是，对于一个面心立方，当球体的较小时出来这个问题，很是费解，请指教