Solution : https://service.sap.com/sap/support/notes/48184 (SAP Service marketplace login required)
Summary :  Key words :  Related Notes : 
      This SAP Note discusses methods to halt an upgrade process at a specific phase during a system upgrade or Enhancement Package installation. SAP offers specific commands (R3up stop 
<putdir>/bin directory, r3up stop <phasenname>, => r3up stops, r3up version 4, execution r3up, terms upgrade, release upgrade, phase reason, ehp installation, lower release
       
        
 
        
            1512410 Wrong delivery class 'E' for CU customizing tables 807870 Long run time of Report RFMXPR41 658280 Incorrect dependents are not edited repeatedly 485992 Upgrade IS-U/CCS 4.62 and 4.63: ISU_XPRA_PRINTDOC_BLART 410277 Customer master records point to plant addresses after upgra 409671 Transport/Upgrade:Types with ref. to new classes/interfaces 409442 XPRA RCCUVLXP incorrect variant table content III 388803 XPRA RCCUVLXP incorrect variant table sorting 373038 Organizational Management: data missing after upgrade 371866 XPRA RCCUVLXP contents variant table incorrect II 367174 Upgrade IS-M 4.62: Error in RJHXPRA_461_TSPEZ 358906 BW1.2B upgrade to BW2.0: Index structure 353861 HR: Upgrade to 4.6C (or higher) 315377 Additional information about upgrading to 3.1I SR1 310852 Performance improvement with upgrade and service packages 207478 SAP bus.partner: XPRA BUPXPR11 can cause data loss 206328 XPRA RCCUVLXP contents of variant table incorrect 147134 XPRA RSXADR12: Termination when sorting/importing table SADR 141319 HR-DEUEV: person group key for upgrade 3.x -> 4.x 134766 Exchange Upgrade AFS V1.0C Fixpack 4 to AFS V1.0D 132305 DB2/390: Upgrade: Create INDEXES with DEFER YES 128589 Upgrade to 4.0B/4.5A destroys customer variants 91709 Addition upgrade to 4.0B 91692 Additional Info: Upgrading to 4.0A 91594 Additional Info: Upgrading to Release 3.1I 76604 Additional Info: Upgrading to 3.1H 75148 Secondary indices when upgrading from 2.x to 3.x/4x 64570 Additional Info: Upgrading to 3.1G 60095 Upgrade translation system and save translation 48632 Additional Info: Upgrading to 3.0F 43288 Additional Info: Upgrading to 3.0E 37387 Additional Info: Upgrading to 3.0D 33004 Additional Info: Upgrading to 3.0C