By default SharePoint will display basic message to users this is
useless when we are doing any trouble shooting to display complete error
description and stack trace of the error you need to modify the web.config for
the WebApplication.
We can achieve this by following below steps.
1)
Disable
Custom Errors: Set the customErrors mode to "Off"
Find:
<system.web>
<customErrors mode="On" />
Change To:
<system.web>
<customErrors mode="Off" />
2)
Enable
the Call Stack Trace: Set the CallStack value of the SafeMode element to
"true"
Find:
<SharePoint>
<SafeMode ... CallStack="false" ...
>
</SharePoint>
Change To:
<SharePoint>
<SafeMode ... CallStack="true" ...
>
</SharePoint>
3)
Enable
Debugging Mode: Set batch and debug to "true"
Find: <compilation batch="false"
debug="false">
Change To: <compilation batch="true"
debug="true">
Enable the ASP.NET tracing feature:
Include the following line in the <system.web> element
of the web.config file.
<system.web> ...
<trace enabled="true"
pageOutput="true"/>
