I am writing to you about a problem we encountered in working with MSO Excel documents using the Aspose Cells for Java library (v 20.10.0).
Specifically, when we try to load an Excel document whose format type is “xls”, an (Runtime) exception is thrown with the message “Unable to instantiate Excel Document.”.
On the other hand, if the same document is saved in “xlsx” format using MSO Excel, it is loaded without any problems.
I am enclosing the zip file with test code, source files (.xls and .xlsx) and the picture of stack trace log.
In the hope that together we will quickly overcome the problem!
Test code, source files and pic.zip (97.0 KB)