AVETMISS error codes/3211
AVS error 3211
ErrorNAT00120Activity start date
What it means
Triggers when the Activity start date is after the collection-period end date; runs as an error for the annual (Jan-Dec) period and as a warning (W3211) for quarterly periods.
How to fix it
Report activity that is current as at the collection-period end date, or correct the start date.
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.