I use Aspose Slides to create a PowerPoint document containing a number of charts saved as .png files. This application is serveral years old. A few weeks ago a user complained that the PowerPoint document reported an error when opened. The error text is as follows:
PowerPoint was unable to display some of the text, images, or objects on the slides in the file, , because they have become corrupted. Affected slides have been replaced by blank slides in the presentation and it is not possible to recover the lost information. To ensure that the file can be opened in previous version of PowerPoint, use the Save As command (File menu) and save the file with either the same or new name.
There is nothing wrong with the .png files. The version of PowerPoint has not been changed. I am at a loss for what is causing this. Any clues would be greatly appreciated.