int occurrences; /* no of occurrences or -1 if error (see below) */
int errcode; /* Bib-1 diagnostic code; only used when occur.= -1 */
char *errstring; /* Additional string */
int occurrences; /* no of occurrences or -1 if error (see below) */
int errcode; /* Bib-1 diagnostic code; only used when occur.= -1 */
char *errstring; /* Additional string */