What causes a posting failure for intercompany direct delivery orders?

Overview

When creating an intercompany direct delivery SO, a posting failure error is given.

Environment

Microsoft Dynamics AX 2012 R2 CU7

Resolution

• In an AX , where multiple companies exist and intercompany direct deliveries are configured, when attempting to make a packing slip a direct delivery SO, and the item has a taxation group setup under "Purchase", it will cause an error to trigger on this line:
  • \Classes\Tax\allocateInTaxWorkTrans - Line #258 
    
    taxWorkTrans.TaxAmount = Conpeek(ConAmtNumber,1)*(-1); 

• It errors because "ConAmtNumber" never gets a value and is an empty container.
  • It never gets a value because there is no scenario where "taxWorkTrans.SourceTableId" is handled for when the table is PurchLine. 
• Apply the hotfix Avalara AvaTax for Microsoft Dynamics AX 2012 R2 CU7 version AX 6.2.1000.4051.01.16