Hello, I ran intro an error when editing a custom list using the datasheet view. The error occurs when a "person or group" field is edited. Right after the user clicks on another cell after entering data in the person column, IE pops up an alert window with: ---------------------------Windows Internet Explorer---------------------------An error 0x80070057 occurred. No further information was provided.---------------------------OK ---------------------------One thing that I noticed is that the cell is rendered as a combo box, and when the drop down is clicked there are no choices. The choices are typically populated with the sharepoint groups and users of the site. The site has been customized with a custom master page. I have turned logging to verbose and I can not find any relevant entries in the WSS logs.Has anyone run into this and know how to resolve it?Thanks, Alonso Robleshttp://blogs.importchaos.com/alonsorobles

Hello Alonso,Do you have the web.config file set to provide stack trace and debug information? (I mean error reporting on for SharePoint).Quick Reference: http://sharepointkb.wordpress.com/2008/07/25/sharepoint-unexpected-error-has-occured-unknown-error-has-occured-file-not-found/If you do and that is all the information it provides please let me know (also is this an alert box that pops up?),Richard

I'm also getting this error in the exact same scenario (almost word for word), although I have not modified the master page. I do have my web.config set to provide stack trace and debug information, but the error occurs in a javascript popup. There is no more information. This view used to work, but I'm not sure what changed to break it.My blog: http://rapidapplicationdevelopment.blogspot.com/

Ok, solved it. In my case the problem was because I didn't specify List="UserInfo" in my fields.xml file. Try updating your CAML to something like this: <Field ID="{C4F3AF4C-A85A-4939-99D2-CE9C90C32E14}" Name="MyUser" StaticName="MyUser" SourceID="http://schemas.microsoft.com/sharepoint/v3" Group="My Fields" DisplayName="My User" Type="User" Format="FALSE" Sealed="TRUE" ShowField="ImnName" List="UserInfo" UserSelectionMode="0" UserSelectionScope="0" /> For more detail there's an example here: http://msdn.microsoft.com/en-us/library/ms196289.aspxAnd of course the Field element CAML documentation:http://msdn.microsoft.com/en-us/library/ms437580.aspx My blog: http://rapidapplicationdevelopment.blogspot.com/

Alternatively - at least this worked for me on SharePoint Online (Office 365): Open the list in SharePoint designerModify the "Person or Group" column causing the problem. (I noticed at this point that the selected options/settings for this column were not what I originally chose when creating/editing this column in the browser)Make at least one change and save. Now the column should behave as expected.