Followed the below steps in File Definition Manager and unable to see the Tree structure after creating a definition file
Release : All versions
Component : CA File Definition Manager
Removing the comma in the Copybook should resolve the issue.
https://techdocs.broadcom.com/us/en/ca-enterprise-software/devops/test-data-management/4-9/mainframe/working-with-mainframe-files-or-ims-segments/create-an-advanced-file-layout-afl-with-file-definition-manager.html#concept.dita_0a12a0567b4b35524ceae22b06ada14e52305262_parsecopybooks
For continuation of values in COBOL don't need commas. Please see the information provided at 1.7 Continuation of Lines