Introduction
At the level of a journey, the population can be split in two according to a field present in the segment. For this, the 'decision according to a field in the segment' node is used.
The field is not present in the target
If the field required for separation is missing from the population, it is necessary to check that the field is populated in the segment from the queryly node.
The contents of a segment can be viewed at each stage of a journey on the executions page by clicking on the 3 small dots above each node. Alternatively, you can view the segment definition on Queryly.
Conclusion
Once this alert has been lifted, the journey can be relaunched.