Problem with field labels
In both the layout editor and using the vtlib API you can create a field with a label which contains a "/". e.g. Contractor/Installer.
If this field is a UI10 - it breaks the report generator. If you try to include this field in a report the report returns zero records in the list. if you change the label and replace the "/" with "or" for example then the report returns the correct results.
This is either a bug in that nothing prevents you from using a "/" in the label. Or it is a bug in the report generator.