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License '40009329595' is not valid for this build or this product Options
Raul F
Posted: Wednesday, February 4, 2026 8:37:32 AM
Rank: Member
Groups: Member

Joined: 9/23/2019
Posts: 22
Everything was working fine while we were using .NET 9.
But after we switched to .NET 10 we keep getting the following error:

License '40009329595' is not valid for this build or this product (Build: 26.0.34.0, Product: EO.Pdf). Each version uses a different license key. Please make sure your license key version matches your DLL version. If you are testing a new version with an old license key, please remove your old license key to avoid this exception.

Trace:

System.Exception:
at EO.Internal.pejh.unno (EO.Base, Version=26.0.34.0, Culture=neutral, PublicKeyToken=e92353a6bf73fffc)
at EO.Pdf.Contents.PdfContentContainer.wjcb (EO.Pdf, Version=26.0.34.0, Culture=neutral, PublicKeyToken=e92353a6bf73fffc)
at EO.Internal.prwc.rtog (EO.Pdf, Version=26.0.34.0, Culture=neutral, PublicKeyToken=e92353a6bf73fffc)
at EO.Pdf.PdfDocument.rtog (EO.Pdf, Version=26.0.34.0, Culture=neutral, PublicKeyToken=e92353a6bf73fffc)
at EO.Pdf.PdfDocument.Save (EO.Pdf, Version=26.0.34.0, Culture=neutral, PublicKeyToken=e92353a6bf73fffc)
at AdvisoryTools.DocumentConversion.Logic.PdfGeneration.PdfGenerator.GenerateDocument (AdvisoryTools.DocumentConversion.Logic, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null: C:\BuildAgent\work\18440d5ba2df4ec\src\services\core.services\documentconversion\AdvisoryTools.DocumentConversion.Logic\PdfGeneration\PdfGenerator.cs:207)

Do you know what to do in this situation?
eo_support
Posted: Wednesday, February 4, 2026 1:15:19 PM
Rank: Administration
Groups: Administration

Joined: 5/27/2007
Posts: 24,460
Hi,

We tested your license key and it works correctly here. The problem should be just what the error message says: your DLL version does not match your license key version. Since we know your DLL version is v26, so make sure your license key version is also for v26. If you still have problem, you can try to isolate the problem into a small console app and send it to us:

https://www.essentialobjects.com/forum/test_project.aspx

Thanks!


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