Solution : https://service.sap.com/sap/support/notes/1288561 (SAP Service marketplace login required)
Key words :
sap_ap ipc pricing engine 7, check external tax customizing, external tax packages, latest ipc patch, tax calculation fails, canada taxes, configurable product, error message, table ttxd, terms vertex
Related Notes :
| 880749 | Patching of VMC based AP 7.00 engines |