SAP Note 28717 - VD346: Period indicator 4 is not defined

Symptom:

The error message VD346 appears when you create a sales order with date type P (period):
VD346 "Period indicator 4 is not defined".
However, table TPRG contains an entry with language D, Deliv.date P, date type 4. This means that date type P is proposed as a possible entry by means of F4.

Cause and prerequisites

Date type 4 (period indicator P) is not defined. This is hard checked during the date conversion.

Solution
None. This date type must not be used in sales orders.

Additional key words

VA01, VA02, PERIOD_AND_DATE_CONVERT_INPUT, LVDATU01