Error when applying leaves through ESS.

Hi experts,

I've a problem which I'm not sure if it's a problem of customizing or maybe a note not applied. I've searched in the forum and the solution is not working, could you please help me?

We have a mass save absences button from ESS which creates absences for infotype 2001 for all the employees selected. If you create a massive absences for employees in the same personnal group no error is displayed, but if you create a massive absence for mixed employees, it returns the following error: "HRTIM00REC 006 Attendance/absence type ENEM requires minimum of 1"

Does anybody know why? Could you please help me?

Thank you so much in advance for your help.

Regards,

Rebeca