Hi I'm using Mathlab 4.0 on windows NT 4.0 workstation. I keep encountering OUT OF MEMORY ERROR when I attempt any sequence of reasonably complex operations, generally just operations from the Wavelet or Image Processing Toolbox tutorials. The system is running on a pentium 166 Mhz with 32 Mb of ram. I only haver the vars REQUIRED by the tutorial in memory and hav tried the PACK Command. I was wondering if anyone else had encountered a similar problem or had any ideas how to fix it. Thanks Rob ______________________________________________________________________________________________________________ Robert McGrath, e-mail: Robert.McGrath@cs.tcd.ie Machine Vision Lab, Dept. of Comp. Sc. T.C.D. Ireland.