The extents in the space header for the data space noted were not identical to the extents in the corresponding Format 1 DSCB. The extents in the space header were corrected using the extents in the Format 1 DSCB and the Format 3 DSCB if one exists.
Processing continues.
This may be caused by some previous system error. This message is given for information purposes. A later message may indicate whether objects were marked unusable, perhaps as a result of this condition if fewer extents existed in the data set than the data space. Watch for message IDC21027I or IDC21030I.
DFSMSdfp
IDCRS03