Help Center/ Object Storage Migration Service/ FAQs/ Error Codes and Solutions/ TRF.0027 & TRF.0031 Fails to list source objects.
Updated on 2026-07-06 GMT+08:00
View PDF
Share

TRF.0027 & TRF.0031 Fails to list source objects.

Symptom

During the migration, the system displays a message indicating that objects cannot be listed. The migration task cannot continue. This issue occurs during the listing of source buckets.

Possible Causes

  1. The source bucket contains objects whose names contain special characters. As a result, the listing request fails to be parsed. Such special characters include spaces and the following: #?%&+
  2. The source account does not have the ListBucket permission on the source bucket. As a result, the system cannot initiate the listing request.

Solution

  • Check whether the source bucket contains objects whose names contain special characters.
    • Rename necessary objects. Include only standard characters in their names, such as letters, digits, hyphens (-), and underscores (_).
    • Delete other objects.
  • Include the ListBucket permission in the IAM policy of the source account.

After the preceding operations are complete, restart the migration task.