This is indeed an error in the trial version. You will need to modify the OracleData.hpp file as follows:
1. Search for the following line:
/* Hoisted overloads: */
2. Remove the subsequent PSExecuteStatement declaration:
inline int __fastcall PSExecuteStatement(const System::UnicodeString ASQL, Data::Db::TParams* AParams){ return Data::Db::TDataSet::PSExecuteStatement(ASQL, AParams); }
We'll fix this in the trial version today.