regionprops with euler_number hangs

[Anderson, Charles (DNR)]

Any tips on how I can get the Euler number for each region in an image would be greatly appreciated.  My *.M script works fine until the last line, where it just hangs. Even if I enter the last line in the command window, it hangs: no moving to next octave prompt, no error message.

 

imshow(bigmarks)        % 15 regions, several with 1-3 holes

bigprops = regionprops(bigmarks, "basic");

bigprops.Area   % 15 areas

eul = bweuler(bigmarks); % slow; one number for entire image

eul

 

holes = regionprops(bigmarks, "euler_number"); % HANGS

 

I’m running Octave3.6.4_gcc4.6.2 using QOcTerm on a Dell with Windows XP pro. 32bit

 

Thanks

Charles