Could it be that you have aggregate feature geometries in your input? The PointOnLineOverlayer will decompose aggregates by default.

You can try inserting a Deaggregator before the PointOnLineOverlayer and see if that makes a difference in the feature counts.

Thanks for the speedy response. I tried your suggestion but still got duplicate points. I believe the culprit is instances where two line segment intersect so the point is associated with both and thus another point is created. Tried combining the lines but that does not work for all cases. I would like the transformer to simply process the overlay and not create additional features or a setting that can deactivate that function. All this is in an effort to extract M values from the points.

I believe that the PointOnLineOverlayer should not duplicate point features in any case except the case where input point was an aggregate (or multipoint) consisting of multiple points. Could you please share a minimal dataset (points and lines) that reproduce the duplication?

Hi @freddybutler We can't reproduce your problem. Please submit a case via https://www.safe.com/support/report-a-problem/ Thanks!