We have logged an issue as DIAGRAMJAVA-50917 in our issue management system to further investigate this scenario. We will look into its details and keep you posted with the status of its correction. Please be patient and spare us some time.
We have fixed the issue of “Visio008a.vsd”. There are still some text position issues that have not been resolved with the file “Visio001.vsd”.
The file “Visio001.vsd” is generated by an older version of Visio. In 20.6, we do not support reading this version of .vsd files, and an exception will be thrown. Please note that the problem did not exist in older Aspose.Diagram versions (before that we used version 20.6). The data of some text saved in the file "“Visio001.vsd” is abnormal. We will look further into it.