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IIS WITH Aspose.Pdf for .NET

Good morning,
we have an issue with the Aspose.Pdf for .NET product.
We are using IIS 6.1 Build 7.6.01 SP1 with Windows Server 2008 R2 SP1 Standard
In this environment there is a project that is using your Aspose product to place the signature in a PDF document.
Since yesterday our server worked fine and just this morning we have the problem attacched below :

NullReferenceException: Object reference not set to a instance of an object.
Aspose.Pdf.License.SetLicense(String licenseName)
on the code line

immagine.png (40.0 KB)

We tried to replace the original license file “Aspose.Pdf.lic” cause we thought in a possible file damaged issue but nothing changed, we had the same error.

Please help us to solve this problem.
Thnaks in advance for your cooperation
Kind Regards


Thank you for contacting support.

Would you please update us if the error persists even after restarting the server/application or if it disappears randomly. Please also mention .NET Framework version in your environment and create a narrowed down sample application reproducing this issue so that we may try to reproduce and investigate it further. Moreover, please ensure using Aspose.PDF for .NET 18.7 in your environment.

Good morning,
We are using Aspose .NET 18.7.
We restarted the server but the error persisted. For this project , we incapsulated the Aspose DLL directly inside the project. We tried to substitute the DLL with a fresh one and now it works fine. I guess the problem was cause the DLL file was corrupted.
Thanks again for your reply.
Best Regards Monica


Thank you for your kind feedback.

We are glad to know that things have started working in your environment. Please feel free to contact us in event of any further query.