Files that were allocated/initialized using the Endevor initialization utility BC1PDSIN are causing S001 abends.
BC1PDSIN must be coded with DDNAME C1INITXX or C1LISTXX to perform the initialization. Any other DDNAME will result in the file being allocated but not initialized and result in S001 abends.
Example:
//INIT EXEC PGM=BC1PDSIN //C1LIST01 DD DSN=&&COBLIST,DISP=(,PASS), // SPACE=(CYL,(5,5)),UNIT=&WRKUNIT, // DCB=(RECFM=FBA,LRECL=133,BLKSIZE=6251) //C1INITXY DD DSN=&&LNKLIST,DISP=(,PASS), // SPACE=(TRK,(5,5)),UNIT=&WRKUNIT, // DCB=(RECFM=FBA,LRECL=133,BLKSIZE=6251) //LIST02 DD DSN=&&BNDLIST,DISP=(,PASS), <=== this file will not // SPACE=(TRK,(5,5)),UNIT=&WRKUNIT, be initialized because // DCB=(RECFM=FBA,LRECL=133,BLKSIZE=6251) of its DDNAME