this a basic question. in my code to read-in a .gii file, i do this:

gifti_image* image = gifti_read_image (fname, 0);

giiDataArray* coords = gifti_find_DA
(image, NIFTI_INTENT_POINTSET, 0);

giiDataArray* faces = gifti_find_DA
(image, NIFTI_INTENT_TRIANGLE, 0);


but when i look at the coords and faces arrays in debugger, the 'data' field is null. this happens when reading in the caret data, or the vistrails data.

i am probably just not doing something simple. is reading the data array an extra step? i can't seem to figure this out from the example files.

N.