Connector 1.1.19 cpp getstring error more informations (no replies)

Hy
when i use library as 1.1.19, it's the same

list off dll loaded:

'FTPexample.exe'. Les symboles ont été chargés.
'C:\Windows\SysWOW64\ntdll.dll'.
'C:\Windows\SysWOW64\kernel32.dll'.
'C:\Windows\SysWOW64\KernelBase.dll'.
'C:\Windows\SysWOW64\user32.dll'.
''I:\Projets\ftpclient_demo_mfc\FtpClient_Demo_Mfc\Release\msvcp140.dll'.
'I:\Projets\ftpclient_demo_mfc\FtpClient_Demo_Mfc\Release\mfc140.dll'.
'C:\Windows\SysWOW64\win32u.dll'.
''C:\Windows\SysWOW64\ucrtbase.dll'.
'C:\Windows\SysWOW64\advapi32.dll'.
'C:\Windows\SysWOW64\gdi32.dll'.
'C:\Windows\SysWOW64\vcruntime140.dll'.
'C:\Windows\SysWOW64\msvcrt.dll'.
'C:\Windows\SysWOW64\gdi32full.dll'.
'C:\Windows\SysWOW64\sechost.dll'.
'Chargé 'C:\Windows\SysWOW64\msvcp_win.dll'.
Chargé 'C:\Windows\SysWOW64\rpcrt4.dll'.
'C:\Windows\SysWOW64\shell32.dll'.
'C:\Windows\SysWOW64\sspicli.dll'.
'C:\Windows\SysWOW64\cryptbase.dll'.
''C:\Windows\SysWOW64\cfgmgr32.dll'.
'C:\Windows\SysWOW64\bcryptprimitives.dll'.
'C:\Windows\SysWOW64\SHCore.dll'.
'C:\Windows\SysWOW64\combase.dll'.
'C:\Windows\SysWOW64\ole32.dll'.
'C:\Windows\SysWOW64\windows.storage.dll'.
'C:\Windows\SysWOW64\oleaut32.dll'.
'C:\Windows\SysWOW64\shlwapi.dll'.
'C:\Windows\SysWOW64\profapi.dll'.
'C:\Windows\SysWOW64\powrprof.dll'.
'C:\Windows\SysWOW64\imm32.dll'.
'C:\Windows\SysWOW64\umpdc.dll'.
'C:\Windows\SysWOW64\kernel.appcore.dll'.
'C:\Windows\SysWOW64\uxtheme.dll'.
'C:\Windows\SysWOW64\cryptsp.dll'.
'C:\Windows\SysWOW64\ws2_32.dll'.
'C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.18362.592_none_71d995095ae1acb5\comctl32.dll'.
'I:\Projets\ftpclient_demo_mfc\FtpClient_Demo_Mfc\Release\mysqlcppconn.dll'.
''I:\Projets\ftpclient_demo_mfc\FtpClient_Demo_Mfc\Release\libmysql.dll'. Le module a été généré sans symboles.
'I:\Projets\ftpclient_demo_mfc\FtpClient_Demo_Mfc\Release\libmysql.dll'
'C:\Windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9659_none_d08cfd96442b25cc\msvcr80.dll'.
''C:\Windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9659_none_d08cfd96442b25cc\msvcp80.dll'.
'I:\Projets\ftpclient_demo_mfc\FtpClient_Demo_Mfc\Release\libmysql.dll'. Le module a été généré sans symboles.
'C:\Windows\SysWOW64\wsock32.dll'.
'C:\Windows\SysWOW64\NapiNSP.dll'.
'C:\Windows\SysWOW64\pnrpnsp.dll'.
'C:\Windows\SysWOW64\mswsock.dll'.
'C:\Windows\SysWOW64\dnsapi.dll'.
'C:\Windows\SysWOW64\nsi.dll'.
'C:\Windows\SysWOW64\IPHLPAPI.DLL'.
'C:\Windows\SysWOW64\winrnr.dll'.
Chargé 'C:\Windows\SysWOW64\nlaapi.dll'.
Chargé 'C:\Windows\SysWOW64\wshbth.dll'.
Chargé 'C:\Windows\SysWOW64\rasadhlp.dll'.
'C:\Windows\SysWOW64\clbcatq.dll'.
'Chargé 'C:\Windows\SysWOW64\FirewallAPI.dll'.
Chargé 'C:\Windows\SysWOW64\fwbase.dll'.
Chargé 'C:\Windows\SysWOW64\fwpolicyiomgr.dll'.
' Chargé 'C:\Windows\SysWOW64\riched32.dll'.
Chargé 'C:\Windows\SysWOW64\riched20.dll'.
Chargé 'C:\Windows\SysWOW64\usp10.dll'.
Chargé 'C:\Windows\SysWOW64\msls31.dll'.
Chargé 'C:\Windows\SysWOW64\msctf.dll'.
C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.18362.592_none_2e6de868278ee708\comctl32.dll'.
Chargé 'C:\Windows\SysWOW64\TextInputFramework.dll'.
'C:\Windows\SysWOW64\CoreUIComponents.dll'.
'C:\Windows\SysWOW64\CoreMessaging.dll'.
'C:\Windows\SysWOW64\ntmarta.dll'.
'C:\Windows\SysWOW64\WinTypes.dll'.
''C:\Windows\SysWOW64\FWPUCLNT.DLL'.
'C:\Windows\SysWOW64\bcrypt.dll'.
''C:\Windows\SysWOW64\iertutil.dll'.