We are using Aspose.pdf.dll version 10.1.0.0. Just recently after doing server patching we started to notice a lot of “Unable to read beyond the end of the stream” errors. Nothing else changed. In code what is being done is a Aspose.pdf.facades.form.save and a Aspose.Pdf.Document.Save. These events are being captured by our event log on our server. Windows Server 2012 R2 Datacenter 64 bit. There are hundreds of these error per day.
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Can you please try to use Aspose.PDF latest version 19.12 on your end and if there is still an issue than please share sample project to reproduce issue.