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KB-1848 "Invalid bean property name 'Attachments'" error when triggering a process via email

August 3, 2026 at 1:02 PM
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Symptoms

When attempting to trigger a process with an email that contains an attachment, the process does not start. The following error is seen in the logs:

ERROR:EVAL:@reason=Invalid bean property name 'Attachments' (valid properties are x_google_smtp_source;cc;mime_version;x_received;ccnames;tonames;recipients;recipientsemails;recipientsnames;destinationpmid;attachmenterrors;delivered_to;bodies;importance;content)

Cause

The Email Attachments Folder has not been configured in the process model properties.

Action

Open the process model properties for the process in question and configure the Email Attachments Folder:

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: January 2019