AVETMISS error codes/3251
AVS error 3251
ErrorNAT00120Activity End Date
What it means
Activity end date is after the collection-year end, so the outcome must not be final.
How to fix it
Use Outcome 70 (continuing), or move the end date within the collection year.
Does RTObase catch this automatically?
Yes, RTObase validates this against your own data before you lodge and takes you straight to the field to fix it, so this error usually never reaches AVS.
Got a whole report of errors? Explain them all at once.
Error explainer →Guidance only, not a substitute for lodgement. Meaning current as of July 2026; AVS rules and error/warning status can change between collection periods. Always re-validate in NCVER AVS before you submit.
Never see this error again
RTObase validates your AVETMISS data as you go and deep-links you straight to the field to fix, so most AVS errors never happen. Start free.