Imrotate in clockwise direction

I have a binary image 'II1'. I want to rotate this image in clockwise direction and find the indices in particular column of the image. so i used imrotate(II1,-theta) (theta is angle i specified - 6.54) While doing so i am finding errors -

??? Error using ==> mtimes Out of memory. Type HELP MEMORY for your options.

Error in ==> maketform>trans_affine at 226 U1 = X1 * M; % Transform in homogeneous coordinates

Error in ==> maketform>inv_affine at 192 U = trans_affine(X, t, 'inverse');

Error in ==> maketform>inv_composite at 592 U = feval(t.tdata(i).inverse_fcn, U, t.tdata(i));

Error in ==> tform at 56 X = feval( t.(f.fwd_fcn), U, t );

Error in ==> tforminv at 68 varargout = tform('inv', nargout, varargin{:});

Error in ==> tformarray at 241 M = tforminv(G,T);

Error in ==> imrotate at 155 B = tformarray(A, T, R, [1 2], [1 2], outputSize, [], 0);

Error in ==> test_2 at 132 rot_im2 = imrotate(rot_ad_im2,-theta);

Could anyone tell me why i am getting these errors?? I found it is working some times and some times it is giving errors. The Image that i am working on is uploaded in below link

http://imageshack.us/photo/my-images/24/testfig.png/

[David Sanchez]

How big is your image? It seems you machine is running out of memory to perform the intermediate steps required by the algorithm. Did you try the example given in the help (help imrotate) ? If this example works fine every time ( it uses a small image ), think about halting some hidden processes from your machine.

[Divya]

The image size is 514x514. What do you mean by halting some hidden processes ?? and yes, i checked the example from the help(imrotate) and it is working fine everytime

[Divya]

Is this problem occurring because of negative angle in imrotate??? If i use positive angle and modify my code, is there any chance that i don face these memory problems in future??