This may occur when the effort used on the"Goals and Results" tab for the appeal has a effort seq longer than 4 digits. This is a bug, BG 2426755, where certain fields in the segmentation matrix and OLAP cube process aren't large enough to handle a 5 digit effort seq, even though TA lets the effort seq go as large as 10 digits.

Contact Team Approach Support about getting an applied fix to expand the field in the necessary places.