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We recently migrated to FME 2025.1.2 / ArcGIS Pro 3.5.3

Now I need to update some records in a point featureclass in SDE so I created a new workspace with a Creator, a FeatureReader, an AttributeCreator and a FeatureWriter.

Reading the data from SDE works as expected. But when I try to write the data, I get the following errors:

2025-10-22 13:12:21|   2.0|  0.0|ERROR |Esri Geodatabase Writer: Feature Type Definition 'd_y_n' was requested, but not defined. Please visit https://www.safe.com/support
2025-10-22 13:12:21|   2.0|  0.0|ERROR |GEODATABASE_SDE writer: An error has occurred. Check the logfile above for details

Not writing anything dynamic. Just point to the correct featureclass and go.

I think I’m now pretty much out of options, because I upgraded my ArcGIS Pro.The only way to get it to work again is to remove ArcGIS Pro 3.5 and install a version which does work with an older version. I came from 2021.2.6 so I know that works, but I would prefer a more recent version.

So my question is, I’m looking for a recent FME / ArcGIS Pro combination from another user, that is known to be working. Because installing deinstalling ArcGIS Pro is such a hassle.

When I have done the work I need out of the door and have time left, I’ll submit a ticket for this error.

Turns out this error came from the attribute fme_template_feature_type which has the value d_y_n. Exposing and removing this attribute fixed my problem.

Good that you found it, I know i’ve seen this warning previously but had no idea on what i’d done to correct.

Thanks. I must admit I caused this issue myself. My proces looked like this:

  • Workspace A
    • SDE to FFS (to create a backup and have better performance iterating while building workspace B)
  • Workspace B
    • FFS to SDE 

So I introduced this attribute fme_template_feature_type by reading back the data from FFS.

Was a little bit shocked when I realized the implication of not being able to write to SDE anymore, hence the tone in the initial post, but at least I found the solution myself 😅

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