medium severityPhoenix CLI px traces export, phoenix-to-arize migration scripts
Import errors when loading Phoenix-exported traces into Arize AX; check results/ folder for attribute formatting errors; traces fail to import or appear incomplete.
Root cause
Some span attributes in Phoenix trace exports use formatting incompatible with Arize AX import expectations, causing parsing failures during import. The migration scripts cover common cases but miss some attribute structures. Fixes must be applied manually to traces.json before re-import.
Arize Phoenixtrace exportformat inconsistencyspan attributesmigrationJSON