See all articles from Update October 1988
The TS-2068 remembers ON ERR and the line number in an ON ERR statement well after the program line that contains the ON ERR GO TO statement has been executed. Then the first error condition forces the abandonment of sequential line read, and the line that is designated in the ON ERR statement is executed. Therefore, if you use ON ERR GO TO line, it is best to terminate the ON ERR whether an error exists or not.