Official rule text
[ibr-co-19]-If Invoicing period (ibg-14) is used, the Invoicing period start date (ibt-073) or the Invoicing period end date (ibt-074) MUST be filled, or both.
What this means
An invoicing period was given without a start date or an end date; at least one of the two must be filled in.
What to do
Share this rule id with whoever manages your invoicing software or IT — or ask TechMate to fix it for you (see below).
Check whether your invoice hits this rule — freeDelivery & invoicing period
Whether delivery dates and the invoicing period (for invoices that cover a date range rather than a single delivery) are present and consistent with each other.
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