Hi @Clive Swan​,

It looks like you may have multi-polygons in your source data. The Dissolver will de-aggregate the multi-polygons before dissolving, which can result in a higher polygon count. If you add an Aggregator after the Dissolve with the Group By set to the same attribute used in the Dissolver, it will rebuild the appropriate multi-polygons for you.

Hi Dave,

Thanks for the reply.

I have two polygons, want merged into a single polygon, They are two separate records not a multi-polygon.

I am trying to do a union, to merge the two features.

I added an Aggregator to the Dissolver, it outputs 4 polygons, not one.

I am trying to aggregate duplicate polygons, with their attributes.

Not sure what is wrong??

I updated the Transformers.

522 records are aggravated into 311 records.

310 get inserted into the ESRI fgd, but one record fails??

Any suggestions how to insert the record that fails??

Try moving the GeometryFilter and GeometryValidator before the Aggregator.

Hi Dave,

Thanks for the suggestion.

I moved the GeometryFilter and GeometryValidator before the Aggregator.

310 Records are processed, but one keeps failing??

I am getting a warning at the GeometryCoercer-Multi Transformer.

GeometryCoercer: Cannot coerce from IFMEAggregate to fme_multi

Try sending the problem feature to a Logger, then examining the geometry in the log to see how it is structured. This should show why it can't be converted to a multi-polygon.

Hi Dave,

I have tried numerous Transformers, I still have a single record that is rejected.

There are 311 records

310 are multi-records

1 record in aggregate

The error message is:

GeometryCoercer: Cannot coerce from IFMEAggregate to fme_multi

Is there any Transformer to convert the single record to fme_multi??

Thanks

Clive

Please log the problem feature with a Logger transformer, then attach the log file here. That will help me determine how to deal with. it.

I finally found the problem.

There was a splice that was really difficult to find!!