Hi, I am using RMAexpress v0.5alpha7 and found that I could process 120 arrays (HGU133 Plus2.0) but had a Runtime error when processing 150 arrays at the point of building the "Data Structures". The memory usage was not limiting and so it seems that an array was being over-written. Is my only choice remaining to install onto linux? Lana Schaffer Biostatistics/Informatics The Scripps Research Institute DNA Array Core Facility La Jolla, CA 92037 (858) 784-2263 (858) 784-2994 schaffer@xxxxxxxxxxx