DFS1900I SC=08 DUPLICATE VERTICAL TAB STOP(S) SET TO ZERO
Explanation
The tab stop values in the VT= keyword must be distinct or zero if VTAB= is specified.
System action
Repeated occurrences of tab stop values are set to zero, and processing continues with the next operand.
Programmer response
Nonzero vertical tabs must be unique. Change duplicate nonzero vertical tabs to unique values between top margin and bottom margin, and rerun the job.