Use variable in if else construction

[zhaojinghua]

I am grouping row by a field in the talbe. However, I can’t use <group name>_COUNT variable in the if-else construction, e.g. ($V{EA_GROUP_COUNT} == 1) ? whatever1 : whatever2). It doesn’t work at all. The condition always returns false and always do whatever2. How to use variable in an  if-else construction?