SourceUrl == /uploads/pdf/20190730052041appropriate_technology_project_gutenberg_v_.pdf finalPath == D:\wwwroot\Uploads.Worldlibrary.Net\uploads\pdf\20190730052041appropriate_technology_project_gutenberg_v_.pdf Object reference not set to an instance of an object. at GetPdfFile.LogBookDownload() in d:\wwwroot\Out_Wpl\GetPdfFile.aspx.cs:line 361
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