CSMS #52276169 - ACE System Issues have returned U.S. Customs and Border Protection sent this bulletin at 06/24/2022 08:33 PM EDT Cargo Systems Messaging Service CSMS #52276169 - ACE System Issues Have Returned The ACE system issue and responses not being sent to Trade has returned. CBP is continuing to work on the issue and another CSMS message will be sent once Resolved.