KnowledgeBase Content Details

February 26, 2014

Question:

"HTTP status 404: Not Found" error when saving or closing a large experiment

Answer:

Sometimes, experiments containing large files cannot be saved:

-------------------------
Error Saving Contents
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Sorry, while saving experiment "XXXXXX-XXX", an error occurred on the business tier: The request failed with HTTP status 404: Not Found.
-------------------------

Some experiments can be saved, but Sign and Close fails after clicking on "Submit" (rendering process goes through without a problem):

"Sorry, while submitting document, while submitting document, The request failed with HTTP status 404: Not Found."


SOLUTION:

If you have IIS 7 or higher on your Application Server, please check the following two files on that machine:

In those web.config files, maxRequestLength indicates the maximum request size supported by ASP.NET. (Please find more about this parameter at http://www.cambridgesoft.com/support/EnterpriseSupport/KnowledgeBase/FAQ/details/Default.aspx?TechNote=1040.) On the other hand, maxAllowedContentLength (if not present, the default is 30 MB) specifies the maximum length of content in a request supported by IIS 7. So you need to set both (to e.g. 100 MB) in order to upload large files: the smaller one "takes priority". If your web.config files have maxRequestLength="102400" (in kilobytes, i.e. 100 MB), you also need to specify maxAllowedContentLength="104857600" (in bytes, i.e. 100 MB).

You can introduce the maxAllowedContentLength parameter into the system.webServer settings at the end of the web.config file. With that change in place, the last part (in the system.webServer settings) will look like:




    <system.webServer>
        <handlers accessPolicy="Read, Script" />
        <directoryBrowse enabled="false" />
        <defaultDocument>
            <files>
                <clear />
                <add value="ENService.asmx" />
            </files>
        </defaultDocument>
        <httpErrors>
            <clear />
        </httpErrors>
    <security>
        <requestFiltering>
            <requestLimits maxAllowedContentLength="104857600" />
        </requestFiltering>
    </security>
    </system.webServer>





    <system.webServer>
        <handlers accessPolicy="Read, Script" />
        <directoryBrowse enabled="false" />
        <defaultDocument>
            <files>
                <clear />
                <add value="CSDocStore.asmx" />
            </files>
        </defaultDocument>
        <httpErrors>
            <clear />
        </httpErrors>
    <security>
        <requestFiltering>
            <requestLimits maxAllowedContentLength="104857600" />
        </requestFiltering>
    </security>
    </system.webServer>


Make sure no one is using applications to avoid data loss, then reset IIS.

Please backup your original web.config files, and restore those if any issues.