"Max. Level of BOM Structure on 50 is too high. Current Item No. [BOM_Number]. End BOM Header No. [BOM_Number]. Level [BOM_level]" error message when you run the Calculate Low Level Code function in Microsoft Dynamics NAV 2009

Hotfix information

A supported hotfix is now available from Microsoft. However, it is only intended to correct the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Dynamics NAV 2009 service pack or the next Microsoft Dynamics NAV version that contains this hotfix.

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Technical Support Professional for Microsoft Dynamics and related products determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Code changes

Note Always test code fixes in a controlled environment before you apply the fixes to your production computers.
To resolve this problem, change the code in the Calculate Low-Level Code codeunit (99000793). To do this, follow these steps:

1. Change the code in the CalcLevels function. To do this, follow these steps:

   1. Add a new local variable, and then specify the variable as follows:

      • Name: ProductionBOMVersion

      • DataType: Record 99000779

   2. Add a new local variable, and then specify the variable as follows:

      • Name: CalculateDeeperLevel

      • DataType: Boolean

   3. Change the code as follows:
      Existing code

      ...
      50,Item."No.",BomHeaderNo,Level);
      
      
      // Delete the following line.
      IF ProdBOMHeader.Status = ProdBOMHeader.Status::Certified THEN BEGIN
      
      ProdBOMHeader."Low-Level Code" :=
      ...

      Replacement code

      ...
      50,Item."No.",BomHeaderNo,Level);
      
      // Add the following lines.
      IF ProdBomComponent."Version Code" <> '' THEN BEGIN 
      ProductionBOMVersion.GET(ProdBomComponent."Production BOM No.",ProdBomComponent."Version Code"); 
      CalculateDeeperLevel := ProductionBOMVersion.Status = ProductionBOMVersion.Status::Certified; 
      END ELSE 
      CalculateDeeperLevel := ProdBOMHeader.Status = ProdBOMHeader.Status::Certified;
      
      IF CalculateDeeperLevel THEN BEGIN 
      // End of the added lines.
      
      ProdBOMHeader."Low-Level Code" :=
      ...

2. Change the code in the RecalcLowerLevels function. To do this, follow these steps:

   1. Add a new local variable, and then specify the variable as follows:

      • Name: ProductionBOMVersion

      • DataType: Record 99000779

   2. Add a new local variable, and then specify the variable as follows:

      • Name: CalculateDeeperLevel

      • DataType: Boolean

   3. Change the code as follows:
      Existing code

      ...
      REPEAT
      // add 2 spaces for alignment to next lines
      CASE ProdBOMLine.Type OF
      ProdBOMLine.Type::Item:
      BEGIN
      EntityPresent := CompItem.GET(ProdBOMLine."No.");
      IF EntityPresent OR (NOT IgnoreMissingItemsOrBOMs) THEN
      SetRecursiveLevelsOnItem(CompItem,LowLevelCode,IgnoreMissingItemsOrBOMs);
      END;
      ProdBOMLine.Type::"Production BOM":
      BEGIN
      EntityPresent := CompBOM.GET(ProdBOMLine."No.");
      IF EntityPresent OR (NOT IgnoreMissingItemsOrBOMs) THEN
      SetRecursiveLevelsOnBOM(CompBOM,LowLevelCode,IgnoreMissingItemsOrBOMs);
      END
      END;
      // end of adding 2 spaces
      UNTIL ProdBOMLine.NEXT = 0;
      ...

      Replacement code

      ...
      REPEAT
      
      // Add the following lines.
      IF ProdBOMLine."Version Code" <> '' THEN BEGIN 
      ProductionBOMVersion.GET(ProdBOMLine."Production BOM No.",ProdBOMLine."Version Code"); 
      CalculateDeeperLevel := ProductionBOMVersion.Status <> ProductionBOMVersion.Status::Closed; 
      END ELSE BEGIN 
      CompBOM.GET(ProdBOMLine."Production BOM No."); 
      CalculateDeeperLevel := CompBOM.Status <> CompBOM.Status::Closed; 
      END; 
      
      // closed BOMs are skipped
      IF CalculateDeeperLevel THEN 
      // End of the added lines.
      
      CASE ProdBOMLine.Type OF
      ProdBOMLine.Type::Item:
      BEGIN
      EntityPresent := CompItem.GET(ProdBOMLine."No.");
      IF EntityPresent OR (NOT IgnoreMissingItemsOrBOMs) THEN
      SetRecursiveLevelsOnItem(CompItem,LowLevelCode,IgnoreMissingItemsOrBOMs);
      END;
      ProdBOMLine.Type::"Production BOM":
      BEGIN
      EntityPresent := CompBOM.GET(ProdBOMLine."No.");
      IF EntityPresent OR (NOT IgnoreMissingItemsOrBOMs) THEN
      SetRecursiveLevelsOnBOM(CompBOM,LowLevelCode,IgnoreMissingItemsOrBOMs);
      END
      END;
      UNTIL ProdBOMLine.NEXT = 0;
      ...