ilink32 linker problem - unable to open *.obj file

I used my own *.dll and created *.lib in my old Borland C++ Builder 6 software. All was working. I wanted to migrate software to Embarcadero C++ Builder 10.3. When I inlude my *.lib to the new project it's appear problem with ilink32. It's raport [ilink32 Error] Fatal: Unable to open file 'U.obj'. I have no idea what is the 'U' file.

I can't find solution of this problem. What methotology I should use to try find a source of problem.

My library has a name WsDll

Command lines looks in this way :

Checking project dependencies...
Compiling Adc.cbproj (Debug, Win32)
bcc32c command line for "WsDll.h"
  c:\program files (x86)\embarcadero\studio\20.0\bin\bcc32c.exe -cc1 -D _DEBUG -output-dir .\Win32\Debug -I
  "C:\Users\Użytkownik\Documents\Embarcadero\Studio\Projects\Adc" -I "c:\program files (x86)\embarcadero\studio\20.0\include\windows\vcl" -isystem
  "c:\program files (x86)\embarcadero\studio\20.0\include" -isystem "c:\program files (x86)\embarcadero\studio\20.0\include\dinkumware64" -isystem
  "c:\program files (x86)\embarcadero\studio\20.0\include\windows\crtl" -isystem "c:\program files (x86)\embarcadero\studio\20.0\include\windows\sdk"
  -isystem "c:\program files (x86)\embarcadero\studio\20.0\include\windows\rtl" -isystem "c:\program files
  (x86)\embarcadero\studio\20.0\include\windows\vcl" -isystem "c:\program files (x86)\embarcadero\studio\20.0\include\windows\fmx" -isystem
  C:\Users\Public\Documents\Embarcadero\Studio\20.0\hpp\Win32 -isystem C:\Users\Public\Documents\Embarcadero\Studio\20.0\hpp\Win32
  -debug-info-kind=standalone -fborland-extensions -nobuiltininc -nostdsysteminc -triple i686-pc-windows-omf -emit-pch -mrelocation-model static
  -masm-verbose -ffunction-sections -fexceptions -fcxx-exceptions -fseh -mstack-alignment=16 -fno-spell-checking -fno-use-cxa-atexit
  -fno-threadsafe-statics -x c++ -std=c++17 -O0 -fmath-errno -tM -tU -tW -o .\Win32\Debug\WsDll.pch --auto-dependency-output WsDll.h
ilink32 command line
  c:\program files (x86)\embarcadero\studio\20.0\bin\ilink32.exe -G8 -L.\Win32\Debug;"c:\program files (x86)\embarcadero\studio\20.0\lib\Win32\debug";
  "C:\Users\Użytkownik\Documents\Embarcadero\Studio\Projects\Adc";"c:\program files (x86)\embarcadero\studio\20.0\lib\win32c\release";"c:\program files
  (x86)\embarcadero\studio\20.0\lib\win32c\release\psdk";C:\Users\Public\Documents\Embarcadero\Studio\20.0\DCP -j.\Win32\Debug;"c:\program files
  (x86)\embarcadero\studio\20.0\lib\Win32\debug";"C:\Users\Użytkownik\Documents\Embarcadero\Studio\Projects\Adc";"c:\program files
  (x86)\embarcadero\studio\20.0\lib\win32c\release";"c:\program files (x86)\embarcadero\studio\20.0\lib\win32c\release\psdk";
  C:\Users\Public\Documents\Embarcadero\Studio\20.0\DCP -l.\Win32\Debug -c -r -v -GD -Gn -Gk
  -GA"C:\Users\UYTKOW~1\AppData\Local\Temp\vfs606B.tmp"="C:\Users\Użytkownik\Documents\Embarcadero\Studio\Projects\Adc\rj_servertransfer.dfm"
  -GA"C:\Users\UYTKOW~1\AppData\Local\Temp\vfs607B.tmp"="C:\Users\Użytkownik\Documents\Embarcadero\Studio\Projects\Adc\rj_SplashForm.dfm"
  -GA"C:\Users\UYTKOW~1\AppData\Local\Temp\vfs6148.tmp"="C:\Users\Użytkownik\Documents\Embarcadero\Studio\Projects\Adc\rj1.dfm"
  -GA"C:\Users\UYTKOW~1\AppData\Local\Temp\vfs6149.tmp"="C:\Users\Użytkownik\Documents\Embarcadero\Studio\Projects\Adc\rj_datamodul.dfm" -aa -V5.0 -w
  -Tpe c0w32w memmgr.lib sysinit.obj .\Win32\Debug\Adc.obj .\Win32\Debug\rj1.obj .\Win32\Debug\rj_datamodul.obj .\Win32\Debug\rj_servertransfer.obj
  .\Win32\Debug\rj_SplashForm.obj , .\Win32\Debug\Adc.exe , .\Win32\Debug\Adc.map , rtl.lib vcl.lib vclimg.lib WsDll.lib import32.lib cp32mt.lib , ,
  Adc.res
[ilink32 Error] Fatal: Unable to open file 'U.OBJ'
Failed
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