If you load a model from an earlier version of Crystal Ball, every effort is made to convert data into the current form if conversion is necessary. Where this is not possible, an error message is displayed stating that data in the specified worksheet could not be converted. An error log is written to the same folder where the model is stored. The log is named worksheet name.xls.CB.txt. For example, if a conversion error occurs in Model2.xls, the log file is named Model2.xls.CB.txt and can be opened in a text editor for review.