Probably you have to set a new max value for the max amount of the "heap" memory, look at the R-help on 'memory.limit' function. Good luck A.S. ---------------------------- Alessandro Semeria Models and Simulations Laboratory The Environment Research Center - Montecatini (Edison Group), Via Ciro Menotti 48, 48023 Marina di Ravenna (RA), Italy Tel. +39 544 536811 Fax. +39 544 538663 E-mail: asemeria at cramont.it