For what my memory is worth, I would suggest you begin by running a
'LISTVTOC' (using IEHLIST) and proceed from there. It *might* then allow
you to reset the VVDS and whatever else, provided you specify whatever
other parms for it (but probably not ones for IEHLIST.) 
 
E.g.
//*********************************************************************
//* JOB TO LIST ALL FILES ON A GIVEN VOLUME                           *
//*                                                                   *
//* 21/12/95 CMP                                                      *
//*********************************************************************
//*
//LISTVTOC EXEC PGM=IEHLIST
//SYSPRINT  DD DISP=(,CATLG),
//             DSN=<whatever>.VTOCLIST,
//             SPACE=(CYL,(10,1),RLSE),
//             DCB=(RECFM=FBA,LRECL=121,BLKSIZE=27951)
//*
//Uxxxxx    DD UNIT=3390,VOL=SER=Uxxxxx,DISP=OLD
//*
//SYSIN     DD *
    LISTVTOC   FORMAT,                                                 X
               VOL=3390=Uxxxxx
//*
 
IDCAMS might be able to delete (and recreate, if required) the usercat
in the mcat, on the volser. But I guess this is not quite what you want,
or you would have done it already.
 


On 26/12/2021 04:42, Peter wrote:
> Hello
>
> Could someone please help me with a sample JCL to reset the VVDS or replace
> the catalog value in it.
>
> Regards
> Peter
>
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