Invalid Argument error on process item dialogue selection
When a CR filter is selected, the process item selection dialog throws an error when trying to select an option for displaying CRs.
That dialog box that is displayed when the process items are opened is actually based on a CR filter. What likely happened is the user had a filter in the past that perhaps has some custom field in there which has since been removed. The easiest way to resolve the issue is to go into the CR filters and find one that has as its first field whatever is displaying in the first column of the process item selection window. In fact if the error dialog box is moved out of the way you will be able to identify all the fields in the filter.