DFS3438 RESERVED INDEX AREA IN MFS BUFFER POOL TOO SMALL.

Explanation
 The area in the message format buffer pool (MFBP)
reserved during IMS initialization for increasing the two indexes
used by the MFBP manager is not large enough to accommodate the increased
PDS directory index resulting from the /MODIFY PREPARE or INITIATE
OLC PHASE(PREPARE) command.

System action
 The command is ignored.

Programmer response

Either increase the reserved area in the MFBP at the next IMS restart, or reduce the
requirements to increase the PDS directory index. The PDS directory index contains one 12-byte entry
per format library directory block. The reserved area is specified as an EXEC parameter (FBPR=) in
the IMS procedure. The
additional space requirement can be calculated as follows:
(12 x (1 + number of additional MFS format 

                                 blocks/10))

plus 

(14 x (number of new $$IMSDIR entries))