Error : Attempted to use an object that has ceased to exist. (Exception from HRESULT: 0x80030102 (STG_E_REVERTED))
This error occurs when you are using the SPContext.Current.Web object and then trying to dispose it.
So, do not dispose of this object or other controls on your page will no longer be able to use it. Thus the error, attempted to use an object that has ceased to exist.
SharePoint will automatically dispose of the SPContext.Current.Web object once your page has completely loaded.