Solution : https://service.sap.com/sap/support/notes/300486 (SAP Service marketplace login required)
Key words : 
cp /<cd_dir>/upgr_31i/unix/solaris/r3up /usr/sap/put/bin, directory /usr/sap/put/bin, \usr\sap\put\bin, important notes  viii/ r3up keyword, cd-rom  iii/ control prior, installed b2b-pro-pi 10b, / important general information  ii/ errors, individual upgrade phases  vi/ problems, b2b-pro-pi 10b, longer post update entries
Related Notes : 
       
| 214503 | Release strategy for PI and PI-A add-ons | 
| 181255 | Overview: Notes about R/3 Add-Ons PI and PI-A |