Because there is a conflict if the CrystalDecisions.Web.dll file I already have in References.
Web.Config
<?xml version="1.0"?>
<!--
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<configuration>
<appSettings>
<add key="CrystalImageCleaner-AutoStart" value="true"/>
<add key="CrystalImageCleaner-Sleep" value="60000"/>
<add key="CrystalImageCleaner-Age" value="120000"/>
</appSettings>
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<system.Web>
<httpRuntime targetFramework="4.5" />
</system.Web>
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<system.web>
<globalization culture="es-PE" uiCulture="es-PE" fileEncoding="utf-8"/>
<compilation debug="true" strict="false" explicit="true" targetFramework="4.5.1">
<assemblies>
<add assembly="CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/> <!--AQUÍ SALE ERROR-->
<add assembly="CrystalDecisions.Shared, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportSource, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportAppServer.Controllers, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportAppServer.DataDefModel, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.CrystalReports.Engine, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportAppServer.ClientDoc, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
<add assembly="Microsoft.Build.Framework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="Microsoft.ReportViewer.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845DCD8080CC91"/>
<add assembly="Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845DCD8080CC91"/>
</assemblies>
<buildProviders>
<add extension=".rdlc"
type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845DCD8080CC91"/>
</buildProviders>
</compilation>
<authentication mode="Forms">
<forms loginUrl="Login.aspx" timeout="2880" requireSSL="true"/>
</authentication>
<httpRuntime/>
<pages validateRequest="false" controlRenderingCompatibilityVersion="4.0" clientIDMode="AutoID"/>
<sessionState mode="InProc" cookieless="false" timeout="60"/>
<httpHandlers>
<add verb="GET" path="CrystalImageHandler.aspx"
type="CrystalDecisions.Web.CrystalImageHandler, CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
<add path="Reserved.ReportViewerWebControl.axd" verb="*"
type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845DCD8080CC91"
validate="false"/>
</httpHandlers>
</system.web>
<system.webServer>
<defaultDocument>
<files>
<add value="Login.aspx"/>
</files>
</defaultDocument>
<handlers>
<add name="CrystalImageHandler.aspx_GET" verb="GET" path="CrystalImageHandler.aspx"
type="CrystalDecisions.Web.CrystalImageHandler, CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"
preCondition="integratedMode"/>
<add name="ReportViewerWebControlHandler" verb="*" path="Reserved.ReportViewerWebControl.axd" preCondition="integratedMode"
type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845DCD8080CC91"/>
</handlers>
<validation validateIntegratedModeConfiguration="false"/>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
According to what you mention in your question, the version of
CrystalDecisions.Web.dllyou have is version 13.0 .The version registered in your application file
web.configis (for the dllCrystalDecisions.Web.dll) version 11.5 .The change you need to make is: update the file
web.configto apply the version number that you actually have, that is, version 13.0 .Thanks for the reply, I ran into the same problem with CrystalDecisions.Web; I compare the version of the web.config and the existing dll in references, they did not agree. I proceed to update the web.config and all good.
Referenced dll example, in my case:
modified web.config: