Solution : https://service.sap.com/sap/support/notes/208527 (SAP Service marketplace login required)
Key words :
support package level 9the support package, % windir% additional key words sapmmc, support package level 6release 4, environment variable windir, msc kx_switch% windir%, windows nt directory, direct system function, support package, system environment, phase kx_switch
Related Notes :
179373 | Additional info for upgrade to Rel.4.6B |
117668 | Additional info: Upgrading to 4.5B |