Solution : https://service.sap.com/sap/support/notes/403692 (SAP Service marketplace login required)
Key words : 
additional key words ehs27bsp01oh, release sap eh&, select external persons, applicant numbers, occupational health, personnel numbers, prerequisites solution, source code, program ehs_scheduling, scheduling
Related Notes : 
       
| 391318 | EH&S 2.7B corrections: Support Package 01 |