I am writing to you about a problem we encountered in working with MSO Excel documents using the Aspose Cells for Java 20.3.0 library. In particular, when we load an Excel document whose format is “.xls” and immediately (without any changes) try to save it, the exception “com.aspose.cells.CellsException: Unknown function with id  (” Based on Chart “at Sheet1! D 3)” is thrown.
I am enclosing the zip file with source code, as well as the source and target Excel files.
In the hope that together we will quickly overcome the problem!
Source code and XLS files.zip (15.2 KB)