>We are trying to unterse a large data set and failing with B378 abends on >VIO
Do you know what is being allocated to VIO? I just allocate a large output dataset to disk and have never encountered a problem with VIO. An output dataset that is ten times the size of the input should handle most cases. I usually run TERSE/UNTERSE with REGION=0M. Workfiles are not specified. Bob Shannon Rocket Software ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html