3807561 - AWS SFTP task fails with "Failure establishing ssh session: -5, Unable to exchange encryption keys" or "curl Failed initialization"- SAP Cloud Integration for data services

• Task fails when transferring files to an AWS remote host using SFTP
• Task error log shows: Error: "curl: Failed initialization"
• Task debug trace includes: "Connected to (IP) port xx", "Failure establishing ssh session: -5, Unable to exchange encryption keys", and "closing connection #1".
• Datastore connection test may succeed, but the task run fails with the above errors. 

• SAP Cloud Integration for data services
• AWS

AWS, AWS Transfer, SFTP, CI-DS, datastore, unable to exchange encryption keys, ssh -5, key exchange, security policy, File Format Group, File Location, FIL-80112, No such host is known, cURL failed initialization, OpenSSH compatibility , KBA , LOD-HCI-DS , HANA Cloud Integration for Data Services , Problem