A new update is available for Base SAS , version 9.4_M6 :
|SAS Note 64207|
A segmentation violation occurs after you submit SYSTASK and WAITFOR statements repeatedly within a macro loop
|This list of notes might be incomplete. For a complete list of issues addressed by this hot fix, visit the hot fix page for D9T028|
Note: A comprehensive list of all SAS hot fixes is available from support.sas.com. You can use the SAS Hot Fix Analysis, Download, and Deployment (SASHFADD) tool to manage your SAS hot fixes.