I have added iso_8859_1.so.3 but still there is a problem to start shadow instance. This solaris was instaled with european packages. However I can start shadow instance with DE or PL with codepage 1401. The question is if I can follow upgrade with this langauage and codepage or there is any danger of failing the upgrade?
I can add that the original system which is being upgraded works on EN/DE/PL with codepage 1401 so maybe there is no problem to continue the upgrade with such settings.
Currently we use de_DE.iso8859-15 on OS level.