Rally-In the Artifacts tab of the Release detail page, adding the To Do or Task Estimate column can cause an error

Products

• Rally SaaS

Issue/Introduction

When displaying the artifacts tied to a Release and added the To Do or Task Estimate column to the display, Rally returned an error:

Weʼre sorry! An unexpected error has occurred.We have recorded this error and will begin to investigate it. In the meantime, if you would like to speak with our Support Team, please reference the information below:com.f4tech.fcl.persistence.CouldNotReadException: could not read class com.f4tech.slm.domain.Artifact such that AggregateQuery[subscriptionRestricted=false, workspaceRestricted=false,

Now the Artifacts tab no longer displays any items and they can't change the filter, select columns etc.  

Cause

The following preference has become corrupt and needs to be deleted

data-table-default/-222444/workproducts

Resolution

Use the following steps to resolve the issue:

1. On your dashboard or a custom page, add the "Custom HTML" app from the App Catalog.
2. Paste the Preference Deleter code from this URL into the HTML section of the Custom HTML app. and <Save>.
3. You will be prompted to enter the Preference Name, enter:  data-table-default/-222444/workproducts
4. Make sure there are no beginning or ending spaces in the entry and click Find Preference.
5. For each preference that is found, please click the Delete button and confirm Delete Preference Permanently.
6. Once you have deleted all preferences, click the Find Preference button again and ensure that you see a popup box titled Preference Not Found.
7. Logout immediately (don't navigate to any other page, so as not to save any additional preferences).
8. Now when you login the filter is gone from the Team Board and your board should load.