SAP Message V4187 - No valid delivery date in schedule line - distribution function

Diagnosis
According to your settings in Customizing, the schedule linetransmitted in segment E1EDP01 should be split up and distributed todifferent days.
According to schedule line distribution function &V4&, however, thesystem could not find any valid days in month &V1& sent in by thecustomer (PRGRS = &V2&, EDATUV = &V3&).

Procedure
Either change the distribution function inCustomizing by marking at leastone valid day for the period sent in by the customer, or adjust thedata in the IDoc so that the period there matches your settings inCustomizing.