In SAS^® 9.3 and earlier, the maximum allowed time for the SLEEP() function or the CALL SLEEP routine is 2**31 - 1 milliseconds,
or 24 days, 20 hours, 31 minutes, and 23.647 seconds.
Any attempt to specify a longer period results in a segmentation violation error in the SAS log or a note similar to the following:

   NOTE: Invalid argument to function SLEEP at line 3 column 8.
         st=2678400 _ERROR_=1 _N_=1

To sleep for longer periods of time, you can issue multiple calls to the function or routine.
The following example demonstrates how to sleep for 31 days:


The maximum time period will be increased in a future release of SAS.