Circular Reference in Microsoft Dynamics NAV Production Bill of Materials
A client called the other day and said that they were getting an error, “Max Levels in BOM Structure on 50 is too high”, when trying to ‘Certify a Dynamics NAV Production BOM’.
This is caused by what is known as a circular reference or an item used on itself.
Figure 1 – Error displayed when certifying a production BOM
When running MRP, the system will be caught in a loop if there is a requirement for Item 1000 that is supplied by Item 1000.
To prevent a circular reference, the certification process checks to see if there is a circular reference and won’t allow the BOM to be Certified if such a reference exists. In this case the problem is easy to see and fix.
Figure 2 – Identifying a circular reference in the BOM
It is a bit more difficult if the circular reference is caused by the item being entered on a lower level subassembly. In this example, we entered Item 1000 on the 1100 Production BOM.
Figure 3 – Circular reference caused when an item is entered in a lower level subassembly
For more information on this or any other Dynamics NAV topic, please contact ArcherPoint.
For more step-by-step instructions on how to perform specific tasks in Microsoft Dynamics NAV, see our collection of How-To blogs.