Solution : https://service.sap.com/sap/support/notes/453679 (SAP Service marketplace login required)
Key words :
system generates error message brain 643, selected hierarchy nodes/ hierarchy node variables, additional key words brain 643, set variable reference hierarchies, message number brain 643, selected reference hierarchy, system automatically assigns, hierarchy node variables, left hand side, select hierarchy nodes
Related Notes :
| 516731 | Multiple use of the same hierarchy node variable |