PROC MEANS/SUMMARY/REPORT/TABULATE may generate incorrect results in SAS
9.1 and 9.1.2 when threading is used.

This only happens on mainframe operating systems. The behavior is
inconsistent. Sometimes the differences do not occur or the
differences can change location from run to run.

If the NOTHREADS option is used, either as a system option or as an
option on the PROC statement, the results are correct.

This has been fixed in SAS 9.1.3.

A Technical Support hot fix for SAS 9.1 (TS1M0) for this
issue is available at:

http://www.sas.com/techsup/download/hotfix/b9_sbcs_prod_list.html#012943

For customers running SAS with Asian Language Support (DBCS), this
hot fix should be downloaded from:

http://www.sas.com/techsup/download/hotfix/b9_dbcs_prod_list.html#012943


A Technical Support hot fix for SAS 9.1.2 (9.1 TS1M2) for this
issue is available at:

http://www.sas.com/techsup/download/hotfix/c9_sbcs_prod_list.html#012943

For customers running SAS with Asian Language Support (DBCS), this
hot fix should be downloaded from:

http://www.sas.com/techsup/download/hotfix/c9_dbcs_prod_list.html#012943

Operating System and Release Information

A fix for SAS 9.1 (9.1 TS1M0) for this issue is available at:

A fix for SAS 9.1 (9.1 TS1M0) with Asian Language Support (DBCS) for this issue is available at:

A fix for SAS 9.1.2 (9.1 TS1M2) for this issue is available at:

A fix for SAS 9.1.2 (9.1 TS1M2) with Asian Language Support (DBCS) for this issue is available at: