Hi:
Generally, the Lev1/SASMain locations are used when a SAS Enterprise Intelligence Platform or some of its components are installed (such as SAS Integration Technologies).
Because that configuration adds metadata and security (and therefore complexity) to using SAS, your best bet for help with this question is to work with SAS Technical Support.
To open a track with Tech Support, visit:
http://support.sas.com/ctx/supportform/createForm or to submit a critical problem by telephone, follow these instructions:
http://support.sas.com/techsup/contact/
cynthia