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"Unable to convert row to 'DimensionFeature' "

  • March 23, 2026
  • 1 reply
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jugoslaviaa
Enthusiast
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Hallo everyone,

I copied and upgraded an ArcGIS Dimension Feature Class (File GDB) using ArcPy.
However, when trying to read it in FME 2024 (FeatureReader / File Geodatabase Reader), I get this error:

Unable to convert row to 'DimensionFeature'

FME can see the schema, but fails when reading the features.

Does FME support reading Dimension Feature Classes, or is there a known workaround?

Thanks.

Best answer by desiree_at_safe

Hi ​@jugoslaviaa! I do wish I could bring better news, but unfortunately, reading Dimension Feature Classes in FME isn’t fully supported yet.

There is an open internal IDEA to include it in a future FME release, though!

As for workarounds, you could possibly convert the Dimension Feature Class into a standard polyline feature class, outside of FME, or if ArcGIS is installed on the same machine, then possibly inside a PythonCaller.

But I’d encourage you to submit a Support Case with us so we can dig into a possible workaround a bit more! 🙂


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[Internal Note: IDEA-1562]

1 reply

desiree_at_safe
Safer
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Hi ​@jugoslaviaa! I do wish I could bring better news, but unfortunately, reading Dimension Feature Classes in FME isn’t fully supported yet.

There is an open internal IDEA to include it in a future FME release, though!

As for workarounds, you could possibly convert the Dimension Feature Class into a standard polyline feature class, outside of FME, or if ArcGIS is installed on the same machine, then possibly inside a PythonCaller.

But I’d encourage you to submit a Support Case with us so we can dig into a possible workaround a bit more! 🙂


--------
[Internal Note: IDEA-1562]