Out of Memory message importing HDR

I have a Dell XPS M1350 PC with window Vista introduced and 4GB
of RAM. I as of late went to fasten a 196 picture circular HDR display
be that as it may, got an out of memory mistake while the pictures were being adjusted. I
thusly diminished the quantity of pictures to make a tube shaped
scene and got an out of memory mistake while producing the picture in
the HDR screen. There is 140GB of free space on my hard plate which I
think ought to be a lot for brief records.
Might you at any point if it’s not too much trouble, offer me some counsel on the best way to stay away from the memory mistakes.