Optional steps for converting SAS version

Document ID : KB000099998
Last Modified Date : 12/06/2018
Show Technical Document Details
I'm executing the checklist to upgrade a MICS test complex from SAS 9.2 to 9.4. Several steps for upgrading specific datasets to 9.4 are marked as Optional. What should we consider in deciding whether to exercise that option? Is there a possibility of error if we don't convert? Will MICS run better if we do convert? We see this on SCREENS, the unit MUOLIBs, the unit database files and some MICSF user private SAS catalogs..
Do a proc contents on the DB's in question .. If the Engine is either BASE or V9 
Then there is no need to convert..