Error message "There must be a group that matched this field"

When I preview with parameters for WorkFlowName, BeginTime, and EndTime I get the error message. Click ok and it brings me to this formula

if (Count ({CallHistory.wrapupcode}, {CallHistory.campaignname}) > 0) then
    100* Count ({CallHistory.wrapupcode}, {CallHistory.wrapupcode}) / Count ({CallHistory.wrapupcode}, {CallHistory.campaignname})
else
    0

Highlighted part it points out is the Bold Italics above.

I am stuck here. Any help would be appreciated.

Edited by sinflspeed - 11 Mar 2015 at 6:42am

Ok, I figured this one out. Just need to clear my head and analyze.