SAP Message /SPE/VL048 - The unchecked del. &1 with predecessor &2 was not converted. (long text)

Diagnosis The unchecked delivery &v1& was not converted as not all items of thisdelivery were selected in the transaction VL10UC. The partial conversionis not supported. System Response The concerned delivery was not converted to a checked delivery andremains unchanged. Procedure Check the selection options in transaction VL10UC or the variant you areusing. Change the variant so that all items for the unchecked deliveryV1 are selected.