Added the following to my project:
dlgExport: TIB_ExportDialog;
csvExport: TIB_Export;
DataPump: TIB_DataPump;

Now the following compile-time error occurs:
[DCC Fatal Error] IB_TransactionSource.pas(227):
F2051 Unit IBF_Base was compiled with a different version of IB_TransactionSource.TIB_TransactionSource

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Rebuilding had no effect on this error.

Any ideas appreciated