Adding IF statement with custom field for column in combined Task and Issue Report

I am pretty much brand new at this. I began by copying a work item report from "https://support.workfront.com/hc/en-us/articles/217521437-Report-Combined-Task-and-Issue-View-and-Grouping">https://support.workfront.com/hc/en-us/articles/217521437-Report-Combined-Task-and-Issue-View-and-Grouping My team works on assigned tasks and issues, but I have had difficulty showing a report that includes both and is correctly sorted. Our issues are primarily created under parent tasks (these are the issues of concern in my post). Our tasks contain a custom form with a numerical custom field (called CCB Rank) that I want to use to sort the combination of tasks and issues (which do not have the form or CCB Rank field). I want to sort the tasks by this field and the issues by the field in their parent tasks, resulting in a sorted list of tasks interspersed with issues. I am currently having two problems getting this to work: 1. I can't seem to use valueexpression to print the desired value when using an IF statement. Here is my expression (0 to be filled in with the answer from #2): valueexpression=IF(ISBLANK({DE:task:CCB Rank}),0,DE:task:CCB Rank) I have tried using the valuefield variable in another test column and this works fine, so I'm pretty confused. For reference, the text for the entire column is: displayname= linkedname=task namekey=view.relatedcolumn namekeyargkey.0=task namekeyargkey.1=CCB Rank textmode=true valueexpression=IF(ISBLANK({DE:task:CCB Rank}),0,DE:task:CCB Rank) valueformat=customDataLabelsAsString 2. I can't figure out how to find the field in the parent task of an issue. I was trying things like: issue:sourceTask:CCB Rank issue:sourceTask:task:CCB Rank issue:sourceTask:DE:task:CCB Rank Issue:source:task:CCB Rank Any help is greatly appreciated! Richard Fabini