A ISPP100 Panel UTIPAN00 not found error indicates that the ISPPLIB panel library has not been allocated in your TSO procedure, CLIST or REXX program.
When executing UTIMAIN either from a REXX program, TSO procedure or a CLIST, the ISPPLIB panel library has to be allocated.
The ISPPLIB panel library can be specified in a number of ways depending on how you are attempting to use it:
ALLOC F(ISPPLIB) +
//ISPPLIB DD DSN=CAI.CALUPENU,DISP=SHR ELIPS
If you are using LIBDEFs to the panel library, you need to specify:
ISPEXEC LIBDEF ISPPLIB DATASET ID(CAI.CALUPENU)
ISPEXEC SELECT PGM(UTIMAIN) NEWAPPL(LIB@) NEWPOOL PASSLIB