My project: .NET 4.0 framework, web application, visual basic, region Norway
Use Spire.Doc to produce final PDF/DOCX documents based on DOCX templates with MERGEFIELD. Used version v7.1.0 for some years with almost no problems. The v7.1.0 is not capable to produce correct HTML versions, so I started to test v9.3.6. on local machine and both HTML and PDF worked perfect. Publishing for production on IIS server the HTML still works perfect but now the PDF productions throws an exception with a specific error.
The latest version which works in production on IIS server in my case, is version v8.6.3. and it serves my needs. So some changes has been included in v8.7.5 which introduces exception which breaks the PDF production. All later versions including the latest v9.4.1 (2 days ago) do not work.
Attached som images wich shows the exception information running Visual Studio Remote Debugging attaching process on IIS server. So have attached 2 images where the first shows exception thrown when it fails on newer versions (v9.3.6). The second images also shows an exception after production of PDF (v.8.6.3), but the pdf stream is returned correct to response.