I have a problem with getting a process instances list via REST-API using a varable filter and the “neq” operator.
I want to get a list of all process instances which don’t have a special variable set, so I use the “neq” operator, but this doesn’t seem to work as expected if a variable is not set.
The problem is, that instances which don’t have the variable set are not returned either.
Result: 1 process instance which DOES NOT have SPECIALVAR set at all.
So in the first place, the result should include this instance, too, but it doesn’t.
Is this a bug?