0P24I C PROG CHECK SYS251=900 ... CCSW=0000627C6000200000 CCB=627C48 ... 0P73I I/O ERROR ... after drive was attached by DYNAMCMS!

Document ID : KB000053468
Last Modified Date : 14/02/2018
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Description:

On z/VSE 4.1 ... with interface to DYNAMCMS ... and IBM 3494 Robot
after drive was attached by DYNAMCMS we received:

F3 0014 0P24I C  PROG CHECK SYS251=900 
   CCSW=0000627C6000200000 CCB=627C48 
F3 0003 0P73I I/O ERROR 

Solution:

An error of this kind may occur, if an error in the definition of the density for a tape dataset is made. For example:
The density associated with drive 900 (for example, '08M') has been removed (by mistake) from the catalog DSN entry !
The density defined in the catalog DSN entry does not match the density that can be written by drive 900 !
The VOLSER mounted on drive 900 has been initialized with the wrong density !