Solution : https://service.sap.com/sap/support/notes/629266 (SAP Service marketplace login required)
Key words : 
explanatory check box checkedmessage        message short text187           product &1, message        message short text081    product &1, partner check function module, debit contracts nothappening correctly, symptom bre validations, storedwith leading zeros, lie betweenthe ship, launch transaction se91, press change button3, debit agreement dates
Related Notes : 
       
| 634869 | SAPKU40001: Support Package 01 for CRM 4.0 |