NeoLoad plays a request that causes an error on the server.
The error message will probably give the main cause of the problem (bad argument for example).
For security reasons, the ASP.NET default settings do not allow errors to be displayed.
To change the settings, you have to disable the
customErrors mode, by editing the
Web.config configuration file thus:
<configuration> <system.web> <customErrors mode="Off"/> </system.web> </configuration>.
Then re-start the application server.