The AVGREC parameter tells the system that you are requesting space in units representing the number of records, rather than the number of blocks. SAS does not currently support this. A circumvention is to specify SPACE in CYLS. A Technical Support hot fix for Release 8.1 TSLEVEL 1M0 for this problem is available at: http://www.sas.com/techsup/download/hotfix/81_sbcs_prod_list.html#005642 A Technical Support hot fix for Release 8.2 TSLEVEL 2M0 for this problem is available at: http://www.sas.com/techsup/download/hotfix/82_sbcs_prod_list.html#005642 For customers running SAS with DBCS extensions, this hot fix should be downloaded from: http://www.sas.com/techsup/download/hotfix/82_dbcs_prod_list.html#005642