You might see User Abend U0101 after you upgrade to SAS 9.4 TS1M5.

If you encounter this issue, check for the following conditions:

• You are running SAS 9.4 TS1M5.
• The abend occurs in a SORT procedure step.
• The host sort utility is SYNCSORT.
• You have a MFX SYNCSORT product (also known as PROC SYNCSORT).

If the conditions noted above are true, this is not a SAS problem. To address this problem, contact Syncsort support and request the fix for SY73630.