If the TOBSNO= option
                  is not specified, its value is calculated based on the observation
                  length and the size of the server's transmission buffers, as specified
                  by the PROC SERVER statement TBUFSIZE= option.
               
 
               The TOBSNO= option is
                  valid only for data sets that are accessed through a SAS server via
                  the REMOTE engine. If this option is specified for a data set opened
                  for update or accessed via another engine, it is ignored.