Hi,
Could you post your template xls file here, we will check it soon.
The error looks to be concerned with Aspose.Pdf product. Anyways, we will soon find out. Which Aspose.Cells and Aspose.Pdf version you were using before that work fine and which versions you are using now?
Thank you.
Amjad Sahi
Support Developer,
Aspose Sialkot Team
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