Solution : https://service.sap.com/sap/support/notes/555656 (SAP Service marketplace login required)
Key words : 
source code corrections contained, cluster table vc1, hr support package, vacation pay reason, active pay period, pay period, active period, corrections section, vacation payout, vacation year
Related Notes : 
       
| 374466 | Q&A: Master Note for Vacation Pay - Canada. |