SourceDocumentLineItem object not initialized.

Hi all,

We are facing the below error while trying to invoice PO: (no PR associated with it).

SourceDocumentLineItem object not initialized.

Stack trace

(S)\Classes\SourceDocumentLineItem\newFromSourceDocumentLineImplementation - line 27

(S)\Classes\SourceDocumentLineMatchingFacade\addSourceDocLineItemToList - line 34

(S)\Classes\ProductReceiptSourceDocumentLineItem\calculateSourceDocumentAmountMap - line 33

(S)\Classes\SourceDocumentLineItem\parmSourceDocumentAmountMap - line 5

(S)\Classes\AccountingDistributionProcessor\changeActiveSourceDocumentLineItem - line 32

(S)\Classes\AccountingDistributionProcessor\process - line 39

(S)\Classes\AccountingDistributionProcessor\distributeSourceDocumentLineItem - line 71

(S)\Classes\SourceDocumentLineState\distribute - line 17

(S)\Classes\SourceDocumentLineStateCompleted\doTransition - line 13

(S)\Classes\SourceDocumentStateBase\transition - line 27

(S)\Classes\SourceDocumentStateBase\performTransitionOrMaintenance - line 7

(S)\Classes\SourceDocumentLineState\performTransitionOrMaintenance - line 36

(S)\Classes\SourceDocumentStateBase\transitionTo - line 15

(S)\Classes\SourceDocumentProcessorBase\submit - line 11

(S)\Classes\SourceDocumentLineProcessor\submitSourceDocumentLineImplementation - line 111

(S)\Classes\SourceDocumentProcessorFacade\submitSourceDocumentLineImplementation - line 26

(S)\Data Dictionary\Tables\VendPackingSlipTrans\Methods\update - line 5

(S)\Classes\FormLetterJournalCreateCorrection\createJournalLine - line 13

(S)\Classes\FormLetterVersionableJournalCreate\createJournalLine - line 3

(S)\Classes\PurchPackingSlipJournalCreate\createJournalLine - line 5

(S)\Classes\FormletterJournalCreate\createJournalLines - line 24

(S)\Classes\FormletterJournalCreate\createJournal - line 19

(S)\Classes\FormletterJournalCreate\run - line 6

(S)\Classes\FormletterService\createJournal - line 29
(S)\Classes\FormletterService\run - line 77

(S)\Classes\FormletterService\postPurchaseOrderPackingSlip - line 14

(S)\Classes\DictClass\callObject
(S)\Classes\SysOperationServiceController\runOperation - line 93

(S)\Classes\SysOperationServiceController\run - line 27

(S)\Classes\FormLetterServiceController\run - line 3

(S)\Classes\PurchFormLetter\run - line 45.

We checked the issue and found that the source document line field in Purchline does not exist in the SourceDocumentLine Table. 

Is there any way to create the source document line, and what are the possible reasons that the source document line Id is deleted.