When you do a Tape-to-Tape Transfer parameter TAPE=YES is required and UNIT and LUNIT must be set to valid unit names for tapes at your site.
Here is sample JCL for a tape to tape transfer:
//<your jobcard>
//* //STEP01 EXEC PGM=XCOMJOB, // PARM=('TYPE=SCHEDULE') //* //STEPLIB DD DSN=XCOM.RXX.CAILIB,DISP=SHR * LOADLIB // DD DISP=SHR,DSN=CEE.SCEERUN * IBM/C RUNTIME //SYSPRINT DD SYSOUT=* * TCP/IP MSGS //SYSIN01 DD * TYPE=SEND IPNAME=<IP NAME> TAPE=YES LUNIT=TAPE UNIT=TAPE DEN=4 LVOL=854122 VOLCT=1 VOLSQ=1 UNITCT=1 LLABEL=(1,SL) LABEL=(1,SL) FILETYPE=FILE FILEOPT=CREATE LFILE='<FILE NAME1>' FILE='<FILE NAME3>' EXPDT=09165 LUSER=xxxxxx *
//