Solution : https://service.sap.com/sap/support/notes/93326 (SAP Service marketplace login required)
Key words : 
shortened fiscal year, usual fiscal year, additional key words, fiscal year variant, incorrect documents individually, attached program correction, special period, normal period, company code, special periods
Related Notes : 
       
| 672255 | Shortened fiscal year/changing fiscal periods | 
| 121478 | Settlement/overheads: in special periods |