Solution : https://service.sap.com/sap/support/notes/432325 (SAP Service marketplace login required)
Key words : 
checks prevent unnecessary errors, note prevents unnecessary errors, system issues error com_hierarchy001, crm/ebp system, customizing object dnl_cust_prod1, message class com_product_custmsg, message class com_scheme, generates material types, system issues, note 432339 describes
Related Notes : 
       
| 872533 | FAQ: Middleware | 
| 437284 | SAPKU30005: Support Package 5 for EBP 3.0/CRM 3.0 | 
| 432339 | Errors during Customizing download DNL_CUST_PROD1 | 
| 428044 | SAPKU30003: Support Package 3 for EBP 3.0/CRM 3.0 | 
| 424198 | SAPKU30002: Support Package 2 for EBP 3.0/CRM 3.0 | 
| 422259 | SAPKU30001: Support Package 1 for EBP 3.0/CRM 3.0 |