did you get that every time or only on very big images?
if the problem was only very big images: - do you use the 32 or 64bit version? - how many free ram do you have?
and you can try to set the "jpegoptimize" setting in the kmakemultires.config (or in the templates/vtour-mres.config for the MAKE VTOUR (MULTIRES) droplet) to "false" - this would reduce the memory extremely,
yep, only happens on the big builds was 8gb psb file, squeezed it down to a 4gb tiff and still the same. I've got an embarrassing amount of ram - 24gb. Will give the 'false' go a whirl now