Solution : https://service.sap.com/sap/support/notes/712966 (SAP Service marketplace login required)
Key words : 
terms release button, contract header level, missing source code, attached source code, symptom items, released manually, leases reason, solution implement, prerequisites
Related Notes : 
       
| 709921 | CRM 4.0 SP Stack 4/2004 (SAPKU40005): Release & Info. Note |