The RETURN CODE 88 (085) indicates that access to the DBID=770 is turned off, usually for backups or other maintenance and did not restore the access when it completed.
To correct this problem, you can run a DBUTLTY job.
//ACCESS EXEC PGM=DBUTLTY,REGION=4M
//STEPLIB DD DISP=SHR,DSN=your.CUSLIB
// DD DISP=SHR,DSN=your.CAAXLOAD
//SYSPRINT DD SYSOUT=*
//SYSIN DD *