Error code: V101

NOW error message:

V101 PAYPERIOD should be the same for all rows in a given PAY CODE and ER CODE

Description:

NOW has rejected the submission as the Tax period coming from payroll differs from the Pay Period Number in NOW's system. Please update the NOW Pay period calendar and check/amend the pay period dates and number to match the details coming from payroll.

https://www.nowpensions.com/help-centre/faq/setting-pay-periods-now-pensions-gateway/