AV in module 'OraOCIEI12.dll'

[cptngrb]

Oracle Client version 12.2 win x64; DOA 4.1.3; Delphi RIO.

why is this happening? I connect to one server.

Result:= TOracleSessionPool.Create(nil);
Result.Homogeneous:= True;
Result.Max:= FSessionCountMax;
Result.LogonUsername:= FUser;
Result.LogonPassword:= FPassword;
Result.LogonDatabase:= ASrv;
Result.TimeOut:= 120;
Result.PoolType:= ptDefault/ptOracle;

if PoolType = ptDefault then LogOn = OK
else ptOracle: LogOn = Access violation at address 000007FEDCAD5CC4 in module 'OraOCIEI12.dll'. Write of address 0000000000000018

 

[cptngrb]

Oracle.NoQueryOptimize:= True;
Result := TOracleSession.Create(nil);
Result.ThreadSafe := False;
Result.StatementCache:= False{True};
Result.Pooling:= spInternal;

These settings seem to solve the problem. but I'm not sure