Solution : https://service.sap.com/sap/support/notes/198845 (SAP Service marketplace login required)
Key words : 
system generates error message vhu01 056 ', additional key words vhu01, industry-specific add-, field 'packaging weight', auxiliary packaging material, handling unit management, ibu automotive customers, field 'packing volume', system displays, volume unit
Related Notes : 
       
| 191581 | |
| 189318 | |
| 150375 | Wrong weight/volume rounding in Automot.pack.dialog |