During the translation process, the software creates log files containing detailed information about the processing of the model. This information includes error messages and entity-mapping statistics. You can use this log file to understand what occurred during the translation.
The software places log files in the directory where the IGES file is either imported from or exported to. The log file name has the prefix name of the Autodesk VIZ file name, with the extension of .xli (input) for import, and .xlo (output) for export.