I installed PG 7.3.4 and created DB with encoding “LATIN10”  . I tried to import Flat-File  with Copy Command 
 
 
String  delimeter ;";
String  FILEPATH ="/home/kerdem/upstream/LIQ.txt";
String pgcopy ="copy public.liq_import from '"+FILEPATH+"' with delimiter '"+delimeter+"'  NULL AS '' "; 
         pstmt = con.prepareStatement(pgcopy); 
                        pstmt.executeUpdate();  
                        pstmt.close();
 
I am getting  
 
WARNING: copy: line 2, UtfToLocal: could not convert UTF-8 (0xe47469). Ignored 
WARNING: copy: line 7, UtfToLocal: could not convert UTF-8 (0xf66765). Ignored 
WARNING: copy: line 7, UtfToLocal: could not convert UTF-8 (0xe4676e). Ignored 
WARNING: copy: line 8, UtfToLocal: could not convert UTF-8 (0xe4747a). Ignored 
WARNING: copy: line 12, UtfToLocal: could not convert UTF-8 (0xc472). Ignored 
WARNING: copy: line 13, UtfToLocal: could not convert UTF-8 (0xe4727a). Ignored 
....... 
.... 
..
I cannot import special letter like (ä,ß,ü,ö). 
 
 
 
But  wenn I use same command  from psql console in DB  I can import all of the special letter,
 
  copy public.liq_import from '/home/kerdem/upstream/LIQ.txt' delimiter ';'  NULL as '' ;
 
I would appreciate any help.