Fixing “Application Error” When Exporting Attachments in dataloader.io

Publish Date: Jun 30, 2026

Description

The “Application Error” is usually caused when the "Body" field is manually added to the SOQL query in dataloader.io from MuleSoft.

Resolution

To avoid this error, please, remove the "Body" field from your SOQL query and ensure you keep it checked in the list of fields on the left panel.

Knowledge Article Number

005318691

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Salesforce Help | Article