For data sets processed with BSAM, you can use CLOSE TYPE=T with the following restrictions:

• The DCB for the data set you are processing on a direct access device must specify either DSORG=PS or DSORG=PSU for input processing, and either DSORG=PS, DSORG=PSU, DSORG=PO, or DSORG=POU for output processing. (You cannot specify the REREAD option if DSORG=PO or DSORG=POU is specified. The REREAD restriction prohibits the use of temporary close following or during the building of a BDAM data set that is allocated by specifying BSAM MACRF=WL.)
• The DCB must not be open for input to a member of a PDS. The CLOSE TYPE=T operation is permitted against a PDS when the DCB has been opened for INPUT mode and the PDS directory is being read.
• If you open the data set for input and issue CLOSE TYPE=T with the LEAVE option, the volume will be repositioned only if the data set specifies DSORG=PS or DSORG=PO.
• CLOSE TYPE=T is ignored for DUMMY data sets.