Since this is a too small part of the LOG file, it's hard d to make any conclusions. Funny that DI Studio is writing to a index file in WORK in an Oracle load situation.
If you restart your session, does this still occur? Do you have enough disk space in relevant file systems? Maybe you should report this to SAS tech support.
None of these mention DI studio, many of them were noted in SAS 8 and many mention SAS/Connect and several of them refer to possibly corrupted files like SASUSER.PROFILE or an item store.
I suggest you work with Tech Support on this issue, or investigate the Tech Support notes on support.sas.com for more information and possible solutions.