[mapserver-users] mapscript.jar error in servlet project

[forest21000]

       Hello,Everyone!I am using mapscript.jar in my servlet project to
generate tilemap in realtime.And lots of time it works very well.But
sometimes,I came across the eroor like this:
        
     * Java.lang.UnknowError:msDrawMap():Image handling error.Failed to draw
layer named 'REGION';msShapefileOpen():Unable to access file
(D:\Ocean_region);msShapefileOpen():Unable to access
file.(D:\Ocean_region.shp)*

  Is it the multi-thread problem?Waiting for your answers!Thanks for your
help! 




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