The G/L Entry already exists error message in Microsoft Dynamics NAV 2013

I recently encountered an issue while posting an item journal line for a serialized item. This was a situation where the Quantity > 1, one serial number per quantity entered in Item Tracking, and the Job No. and Job Task No. fields were both populated on the item journal line.

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Resolution

To resolve the problem required a modification in object Codeunit 22, Item Jnl.-Post Line. The code snippet below shows before and after the modification:

OBJECT Codeunit 22 Item Jnl.-Post Line***************** BEFORE *************************************************************************    LOCAL PROCEDURE PostInventoryToGL@11(VAR ValueEntry@1000 : Record 5802);    BEGIN      WITH ValueEntry DO BEGIN        IF CalledFromAdjustment AND NOT PostToGL THEN          EXIT;        InvtPost.SetRunOnlyCheck(TRUE,NOT PostToGL,FALSE);        IF InvtPost.BufferInvtPosting(ValueEntry) THEN          InvtPost.PostInvtPostBufPerEntry(ValueEntry);        IF "Expected Cost" THEN BEGIN          SetValueEntry(ValueEntry,"Cost Amount (Expected)","Cost Amount (Expected) (ACY)",FALSE);          InvtPost.SetRunOnlyCheck(TRUE,TRUE,FALSE);          IF InvtPost.BufferInvtPosting(ValueEntry) THEN            InvtPost.PostInvtPostBufPerEntry(ValueEntry);          SetValueEntry(ValueEntry,0,0,TRUE);        END;      END;    END;***************** AFTER **************************************************************************    LOCAL PROCEDURE PostInventoryToGL@11(VAR ValueEntry@1000 : Record 5802);    BEGIN      WITH ValueEntry DO BEGIN        IF CalledFromAdjustment AND NOT PostToGL THEN          EXIT;        // MRH0005 >>        CLEAR(InvtPost);        // MRH0005 <<        InvtPost.SetRunOnlyCheck(TRUE,NOT PostToGL,FALSE);        IF InvtPost.BufferInvtPosting(ValueEntry) THEN          InvtPost.PostInvtPostBufPerEntry(ValueEntry);        IF "Expected Cost" THEN BEGIN          SetValueEntry(ValueEntry,"Cost Amount (Expected)","Cost Amount (Expected) (ACY)",FALSE);          // MRH0005 >>          CLEAR(InvtPost);          // MRH0005 <<          InvtPost.SetRunOnlyCheck(TRUE,TRUE,FALSE);          IF InvtPost.BufferInvtPosting(ValueEntry) THEN            InvtPost.PostInvtPostBufPerEntry(ValueEntry);          SetValueEntry(ValueEntry,0,0,TRUE);        END;      END;    END;**************************************************************************************************

Explanation

Posting a line for a serialized item where Quantity=1 works; however, when the quantity was increased, the error appeared. The debugger would stop in Codeunit 12, Gen. Jnl.-Post Line:

    GLEntry."Add.-Currency Debit Amount" := 0;   GLEntry."Add.-Currency Credit Amount" := -GLEntry."Additional-Currency Amount"; END;  GLEntryTmp := GLEntry; GLEntryTmp.INSERT;  NextEntryNo := NextEntryNo + 1;  IF CalcAddCurrResiduals THEN   HandleAddCurrResidualGLEntry;

As it turns out, when the posting routine was creating G/L Entry records, the NextEntryNo in Codeunit 12 was not being incremented properly. Clearing the C/AL global variable InvtPost (which points to Codeunit 5802, Inventory Posting To G/L) in Codeunit 22 causes the variable for Codeunit 12 to be cleared in Codeunit 5802, and NextEntryNo would be initialized properly (pointing to the next G/L Entry No. in the table … this happens in the local C/AL function InitCodeUnit in Codeunit 12).

Conclusion

Although this fixed the problem, be aware that this code is provided without warranty – the reader is advised to verify that this works for his or her installation of Dynamics NAV before implementing this code.

I am interested to see if anyone else has experienced this problem and how they have been able to overcome it.