Problem cleaning up Watchlist

[+MaxB on the River]

We are trying to clear some space in our watchlist (because we've hit the limit again) for travel bugs.

We click the remove but, then get the verify deletion notice with the Yes button.

 

However when we click the yes button we get the following error message.

 

Unable to validate data.

 

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

 

Exception Details: System.Web.HttpException: Unable to validate data.

 

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

 

Stack Trace:

 

 

[HttpException (0x80004005): Unable to validate data.]

System.Web.Configuration.MachineKey.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) +196

System.Web.UI.LosFormatter.Deserialize(String input) +60

 

[HttpException (0x80004005): Authentication of viewstate failed. 1) If this is a cluster, edit <machineKey> configuration so all servers use the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. 2) Viewstate can only be posted back to the same page. 3) The viewstate for this page might be corrupted.]

System.Web.UI.LosFormatter.Deserialize(String input) +118

System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +102

 

[HttpException (0x80004005): Invalid_Viewstate

Client IP: 24.11.233.13

Port: 1414

User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)

ViewState:

 

shortened the error message for space.

 

Removing items one at a time from the watchlist is very frustrating as it is doing it one at a time. It is even more frustrating when we keep getting error messages and have to start over.