Hello, colleagues

I'm trying to upgrade my 2.3.3 (with ITSM) to 2.4.2.
I'm following the steps in UPGRADING file. DB restore and DB update went fine.

running scripts/DBUpdate-to-2.4.pl gives me:

 
otrs@2078 /var/www/some_dir/otrs-2.4.2 $ scripts/DBUpdate-to-2.4.pl
Start migration of the system...                                              

utf8 "\xF6" does not map to Unicode at /var/www/some_dir/otrs-2.4.2/Kernel/System/Config.pm line 161, <$In> chunk 1.                                
utf8 "\xFC" does not map to Unicode at /var/www/some_dir/otrs-2.4.2/Kernel/System/Config.pm line 161, <$In> chunk 1.                                
utf8 "\xFC" does not map to Unicode at /var/www/some_dir/otrs-2.4.2/Kernel/System/Config.pm line 161, <$In> chunk 1.
... a lot more lines skipped ....
Malformed UTF-8 character (unexpected non-continuation byte 0x6e, immediately after start byte 0xf6) in subroutine entry at /usr/lib/perl5/5.8.8/i686-linux-thread-multi/Data/Dumper.pm line 179.                                              
*** glibc detected *** /usr/bin/perl: munmap_chunk(): invalid pointer: 0x099ae250 ***                                                                          
======= Backtrace: =========                                                   
/lib/libc.so.6[0xd566d0]                                                       
/usr/bin/perl(Perl_safesysfree+0x21)[0x80b5ed1]                                
/usr/bin/perl[0x80be3a2]                                                       
/usr/bin/perl(Perl_hv_free_ent+0x65)[0x80be755]                                
/usr/bin/perl[0x80be8d8]                                                       
/usr/bin/perl(Perl_hv_undef+0x34)[0x80c0854]                                   
/usr/bin/perl(Perl_sv_clear+0x5a4)[0x80d2d94]                                  
/usr/bin/perl(Perl_sv_free+0x83)[0x80d30e3]                                    
/usr/bin/perl(Perl_sv_clear+0x3b1)[0x80d2ba1]                                  
/usr/bin/perl(Perl_sv_free+0x83)[0x80d30e3]                                    
/usr/bin/perl(Perl_hv_free_ent+0x47)[0x80be737]                                
/usr/bin/perl[0x80be8d8]                                                       
/usr/bin/perl(Perl_hv_undef+0x34)[0x80c0854]                                   
/usr/bin/perl(Perl_sv_clear+0x5a4)[0x80d2d94]                                  
/usr/bin/perl(Perl_sv_free+0x83)[0x80d30e3]                                    
/usr/bin/perl(Perl_sv_clear+0x3b1)[0x80d2ba1]                                  
/usr/bin/perl(Perl_sv_free+0x83)[0x80d30e3]                                    
/usr/bin/perl(Perl_free_tmps+0x62)[0x80f37a2]                                  
/usr/bin/perl(Perl_pp_nextstate+0x54)[0x80c6184]                               
/usr/bin/perl(Perl_runops_standard+0x29)[0x80c40d9]                            
/usr/bin/perl(perl_run+0x12b)[0x8067a9b]                                       
/usr/bin/perl(main+0x13e)[0x8063bce]                                           
/lib/libc.so.6(__libc_start_main+0xdc)[0xd026fc]                               
/usr/bin/perl[0x8063a01]                                                       
======= Memory map: ========                                                   
00110000-00119000 r-xp 00000000 08:04 32866356   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/List/Util/Util.so                               
00119000-0011a000 r--p 00008000 08:04 32866356   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/List/Util/Util.so                               
0011a000-0011b000 rw-p 00009000 08:04 32866356   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/List/Util/Util.so                               
0011b000-00122000 r-xp 00000000 08:04 25788468   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Data/Dumper/Dumper.so                                       
00122000-00123000 r--p 00006000 08:04 25788468   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Data/Dumper/Dumper.so                                       
00123000-00124000 rw-p 00007000 08:04 25788468   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Data/Dumper/Dumper.so                                       
00124000-00129000 r-xp 00000000 08:04 25953538   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/Sys/Syslog/Syslog.so                            
00129000-0012a000 r--p 00004000 08:04 25953538   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/Sys/Syslog/Syslog.so                            
0012a000-0012b000 rw-p 00005000 08:04 25953538   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/Sys/Syslog/Syslog.so                            
0012b000-0016c000 r-xp 00000000 08:04 22237305   /usr/lib/libssl.so.0.9.8      
0016c000-0016d000 r--p 00040000 08:04 22237305   /usr/lib/libssl.so.0.9.8      
0016d000-00170000 rw-p 00041000 08:04 22237305   /usr/lib/libssl.so.0.9.8      
00170000-00179000 r-xp 00000000 08:04 27086098   /lib/libnss_files-2.9.so      
00179000-0017a000 r--p 00008000 08:04 27086098   /lib/libnss_files-2.9.so      
0017a000-0017b000 rw-p 00009000 08:04 27086098   /lib/libnss_files-2.9.so      
00185000-00188000 r-xp 00000000 08:04 26067089   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Fcntl/Fcntl.so                                              
00188000-00189000 r--p 00002000 08:04 26067089   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Fcntl/Fcntl.so                                              
00189000-0018a000 rw-p 00003000 08:04 26067089   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Fcntl/Fcntl.so                                              
0018a000-00194000 r-xp 00000000 08:04 22237920   /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libgcc_s.so.1                                                            
00194000-00195000 r--p 00009000 08:04 22237920   /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libgcc_s.so.1                                                            
00195000-00196000 rw-p 0000a000 08:04 22237920   /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libgcc_s.so.1                                                            
0022b000-0022d000 r-xp 00000000 08:04 27085641   /lib/libutil-2.9.so           
0022d000-0022e000 r--p 00001000 08:04 27085641   /lib/libutil-2.9.so           
0022e000-0022f000 rw-p 00002000 08:04 27085641   /lib/libutil-2.9.so           
002f2000-002fa000 r-xp 00000000 08:04 25919509   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Encode/Encode.so                                            
002fa000-002fb000 r--p 00007000 08:04 25919509   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Encode/Encode.so                                            
002fb000-002fc000 rw-p 00008000 08:04 25919509   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Encode/Encode.so                                            
002fc000-00416000 r-xp 00000000 08:04 23986217   /usr/lib/mysql/libmysqlclient.so.15.0.0                                                                       
00416000-00418000 r--p 00119000 08:04 23986217   /usr/lib/mysql/libmysqlclient.so.15.0.0                                                                       
00418000-00459000 rw-p 0011b000 08:04 23986217   /usr/lib/mysql/libmysqlclient.so.15.0.0                                                                       
00459000-0045a000 rw-p 00459000 00:00 0                                        
004b7000-004b8000 r-xp 004b7000 00:00 0          [vdso]                        
004d3000-004f7000 r-xp 00000000 08:04 27086030   /lib/libm-2.9.so              
004f7000-004f8000 r--p 00023000 08:04 27086030   /lib/libm-2.9.so              
004f8000-004f9000 rw-p 00024000 08:04 27086030   /lib/libm-2.9.so              
004f9000-004fc000 r-xp 00000000 08:04 25886750   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Digest/MD5/MD5.so                                           
004fc000-004fd000 r--p 00002000 08:04 25886750   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Digest/MD5/MD5.so                                           
004fd000-004fe000 rw-p 00003000 08:04 25886750   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Digest/MD5/MD5.so                                           
00521000-00526000 r-xp 00000000 08:04 26427421   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Socket/Socket.so                                            
00526000-00527000 r--p 00004000 08:04 26427421   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Socket/Socket.so                                            
00527000-00528000 rw-p 00005000 08:04 26427421   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Socket/Socket.so                                            
00569000-0056d000 r-xp 00000000 08:04 26099737   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/File/Glob/Glob.so                                           
0056d000-0056e000 r--p 00003000 08:04 26099737   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/File/Glob/Glob.so                                           
0056e000-0056f000 rw-p 00004000 08:04 26099737   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/File/Glob/Glob.so                                           
00582000-00595000 r-xp 00000000 08:04 27085976   /lib/libnsl-2.9.so            
00595000-00596000 r--p 00012000 08:04 27085976   /lib/libnsl-2.9.so            
00596000-00597000 rw-p 00013000 08:04 27085976   /lib/libnsl-2.9.so            
00597000-00599000 rw-p 00597000 00:00 0                                        
005c3000-005cc000 r-xp 00000000 08:04 27085967   /lib/libcrypt-2.9.so          
005cc000-005cd000 r--p 00008000 08:04 27085967   /lib/libcrypt-2.9.so          
005cd000-005ce000 rw-p 00009000 08:04 27085967   /lib/libcrypt-2.9.so          
005ce000-005f5000 rw-p 005ce000 00:00 0                                        
00639000-0064d000 r-xp 00000000 08:04 27085457   /lib/libpthread-2.9.so        
0064d000-0064e000 r--p 00013000 08:04 27085457   /lib/libpthread-2.9.so        
0064e000-0064f000 rw-p 00014000 08:04 27085457   /lib/libpthread-2.9.so        
0064f000-00651000 rw-p 0064f000 00:00 0                                        
00698000-0069c000 r-xp 00000000 08:04 26230808   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/IPC/SysV/SysV.so                                            
0069c000-0069d000 r--p 00003000 08:04 26230808   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/IPC/SysV/SysV.so                                            
0069d000-0069e000 rw-p 00004000 08:04 26230808   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/IPC/SysV/SysV.so                                            
006d9000-006db000 r-xp 00000000 08:04 27085983   /lib/libdl-2.9.so             
006db000-006dc000 r--p 00001000 08:04 27085983   /lib/libdl-2.9.so             
006dc000-006dd000 rw-p 00002000 08:04 27085983   /lib/libdl-2.9.so             
006dd000-0080f000 r-xp 00000000 08:04 22237097   /usr/lib/libcrypto.so.0.9.8   
0080f000-00817000 r--p 00132000 08:04 22237097   /usr/lib/libcrypto.so.0.9.8   
00817000-00825000 rw-p 0013a000 08:04 22237097   /usr/lib/libcrypto.so.0.9.8   
00825000-00828000 rw-p 00825000 00:00 0                                        
00895000-008a6000 r-xp 00000000 08:04 21352870   /lib/libz.so.1.2.3            
008a6000-008a7000 rw-p 00010000 08:04 21352870   /lib/libz.so.1.2.3            
008bf000-008dc000 r-xp 00000000 08:04 32374849   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/DBI/DBI.so                                      
008dc000-008dd000 r--p 0001c000 08:04 32374849   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/DBI/DBI.so                                      
008dd000-008de000 rw-p 0001d000 08:04 32374849   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/DBI/DBI.so                                      
008fd000-0090f000 r-xp 00000000 08:04 33292540   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/Storable/Storable.so                            
0090f000-00910000 r--p 00011000 08:04 33292540   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/Storable/Storable.so                            
00910000-00911000 rw-p 00012000 08:04 33292540   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/Storable/Storable.so                            
0091b000-0091f000 r-xp 00000000 08:04 26198038   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/IO/IO.so                                                    
0091f000-00920000 r--p 00003000 08:04 26198038   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/IO/IO.so                                                    
00920000-00921000 rw-p 00004000 08:04 26198038   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/IO/IO.so                                                    
00a83000-00a9f000 r-xp 00000000 08:04 27086123   /lib/ld-2.9.so                
00a9f000-00aa0000 r--p 0001b000 08:04 27086123   /lib/ld-2.9.so                
00aa0000-00aa1000 rw-p 0001c000 08:04 27086123   /lib/ld-2.9.so                
00c9f000-00cbc000 r-xp 00000000 08:04 32358450   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/DBD/mysql/mysql.so                              
00cbc000-00cbe000 r--p 0001c000 08:04 32358450   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/DBD/mysql/mysql.so                              
00cbe000-00cbf000 rw-p 0001e000 08:04 32358450   /usr/lib/perl5/vendor_perl/5.8.8/i686-linux-thread-multi/auto/DBD/mysql/mysql.so                              
00cec000-00e23000 r-xp 00000000 08:04 27085970   /lib/libc-2.9.so              
00e23000-00e25000 r--p 00137000 08:04 27085970   /lib/libc-2.9.so
00e25000-00e26000 rw-p 00139000 08:04 27085970   /lib/libc-2.9.so
00e26000-00e29000 rw-p 00e26000 00:00 0
00e5d000-00e5f000 r-xp 00000000 08:04 25739299   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Cwd/Cwd.so
00e5f000-00e60000 r--p 00001000 08:04 25739299   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Cwd/Cwd.so
00e60000-00e61000 rw-p 00002000 08:04 25739299   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/Cwd/Cwd.so
00ead000-00ec8000 r-xp 00000000 08:04 26329109   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/POSIX/POSIX.so
00ec8000-00ec9000 r--p 0001a000 08:04 26329109   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/POSIX/POSIX.so
00ec9000-00eca000 rw-p 0001b000 08:04 26329109   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/POSIX/POSIX.so
00f92000-00f95000 r-xp 00000000 08:04 26296356   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/MIME/Base64/Base64.so
00f95000-00f96000 r--p 00002000 08:04 26296356   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/MIME/Base64/Base64.so
00f96000-00f97000 rw-p 00003000 08:04 26296356   /usr/lib/perl5/5.8.8/i686-linux-thread-multi/auto/MIME/Base64/Base64.so
08048000-08159000 r-xp 00000000 08:04 21497969   /usr/bin/perl5.8.8
08159000-0815a000 r--p 00110000 08:04 21497969   /usr/bin/perl5.8.8
0815a000-0815e000 rw-p 00111000 08:04 21497969   /usr/bin/perl5.8.8
0815e000-08160000 rw-p 0815e000 00:00 0
082f1000-09b9d000 rw-p 082f1000 00:00 0          [heap]
b7b76000-b7c96000 rw-p b7dae000 00:00 0
b7c96000-b7d0a000 rw-p b7e92000 00:00 0
b7d0a000-b7e2a000 rw-p b7d0a000 00:00 0
b7e52000-b7ec6000 rw-p b7e52000 00:00 0
b7ed2000-b7f14000 rw-p b7ed2000 00:00 0
b7f14000-b7f68000 r--p 00000000 08:04 22235621   /usr/lib/locale/locale-archive
b7f68000-b7f6b000 rw-p b7f68000 00:00 0
bfeb9000-bfece000 rw-p bffe9000 00:00 0          [stack]
Aborted

I wonder what could be wrong....

Regards,
Anton.