# X_CRON_NOT_DESCRIBABLE

## Means

a valid cron expression `describeCron` has no vocabulary for

## Typical cause

a 6-field expression whose seconds field says something a 5-field one cannot (`*/10 * * * * *`, `30 0 3 * * *`) — `CronPhrases` has no seconds phrase, so the summary would be wrong

## Fix

render the real runs with `nextCronOccurrences(expr, zone, from, 3)`, or describe the 5-field schedule the `fix:` line prints — never a summary that drops the seconds

[i18n, money, time](/error-codes#i18n-money-time)