Abstract: As part of electronically handling a large amount of data (e.g., error messages) generated within, for example, a telephone service provider's billing network, a configuration utility software allows a user to electronically change or update various configuration parameters for another software application, e.g., a loader application, and also to access the performance data generated by the loader application so as to optimize the performance of the loader application in varying data transfer situations. The loader application, in turn, is a computer-based data transfer application that electronically loads a large volume of data, e.g., telecommunication billing data, from one computer into another computer. After completion of data transfers, an error handler program facilitates electronic investigation and disposal of errors in the received data, thereby minimizing participation of human operators in the data error rectification process.