This topic applies only to systems running a supported version of the Teradata Aster® Execution Engine (for example, AX 7.00.01). All R packages and the dependent OS packages that are installed and upgraded as specified in this chapter will be persistent across an Aster Execution Engine restart. Refer to the Teradata Aster® Execution Engine Aster Instance User Guide for more information about objects that are persistable across an Aster instance restart or failover by using a checkpoint, and objects that are not persistable across an Aster instance restart or failover.