sramazzina commented on issue #6102:
URL: https://github.com/apache/hop/issues/6102#issuecomment-3655019456
Looking at the code, if the comparison is made with a not set variable the
result is always true so the behavior is correct
```
// make the empty value evaluate to true when compared to a not set
variable
String key = StringUtil.getVariableName(variableName);
if (System.getProperty(key) == null) {
success = true;
}
```
I suggest to introduce a flag to modify the standard behavior if needed.
Something like _Always evaluate to SUCCESS if variable is unset_ . We can
enable the flag only when we evaluate to a Variable and we can give that flag a
_default value of true_ so that the legacy behavior is preserved. Let me know
what you think and I will apply the changes
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