Cache Timed Out or does not exists

I keep recieving the following error when attempting to submit to the server:

Cache timed out or does not exists.
StackTrace:
   at Royal4.MP.开发者_高级运维MasterScheduling.ProgramScheduling.iBtnAdd_Click(Object sender, ImageClickEventArgs e)
   at System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e)
   at System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
   at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
   at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
   at System.Web.UI.Page.ProcessRequestMain()

This Error shows up roughly after 2-3 minutes of usage and it seems like it is always happening on a postback that is doing some call to the server. I would like to know what is causing this error (because it is happening quite often and it stops the updates from actually occuring). Another note, when I run the code on my local machine, I cannot replicate the error, I only get the error on my production server. Any help is appreciated.

Additional Information:

Langauge: C# .NET

Framework: .NET 1.1

IIS version: 6

Server: Windows 2003

Database: Progress 4GL (Don't ask)

If Additional information is required, just ask, I'll give as much information as i can.

Thanks,

Tim

"Cache timed out or does not exists." does not sound like a .NET error. My guess is it's being explicitly thrown by your code somewhere.

It would help to see the source code for the function at Royal4.MP.MasterScheduling.ProgramScheduling.iBtnAdd_Click, as it seems this is where the exception is being thrown.

Is your production environment a web farm? Often caching problems can come up under these environments (since cache is not shared between servers in a farm).