Amazon S3 Download Objects Smart Service Completes but Returns Empty Document

Hi everyone,

I’m trying to use the Amazon S3 Download Objects smart service from the Amazon S3 Utilities plug-in in my process model (Appian 24.4) to download a PDF from an S3 bucket and save it to an Appian folder.

Here’s what I’ve configured:
• Secure Credential Store Key: My AWS key is correctly configured in Appian’s Third-party credentials store.
• AWS Region Name: us-east-1
• Amazon S3 Bucket Name: <my-bucket-name>
• Use AWS Client Side Encryption: <value>
• Destination Folder: A valid Appian folder (pv!destinationFolder)
• Files: Dynamically generated file key

The smart service node completes without error, but
• The output document variable is empty
• No file appears in the destination folder

What I’ve verified:
• The file definitely exists in the S3 bucket (I’ve confirmed it manually)
• My credentials have access to get the object
• No errors are shown in the process instance
• Tried giving a static S3 key name too like output_id.pdf, but still no document is returned