I tested it in my machine and all worked fine.
Do you place the license file in the same directory as your program? Is the name of your license file "Aspose.Excel.Web.lic"?
To avoid confusion, you can specifiy the path of the license file. For example:
License license = new License();
license.SetLicense("C:\\LicesneFile\\Aspose.Excel.Web.lic");
Or you can include this license file in your project and build it as embedded resource.
Laurence Chen
Chief Architect
Aspose Nanjing Team
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