LEAVE PROBLEM FOR RESSOURCE

Hello, I have a problem.
When I put time off on a resource, I see it in the PERP, but I do not see it in my GLOVE and I can create tasks during the resource’s time off. How can I ensure that vacation days are taken into account to calculate the task time of this resource?

THANKS

I have no idea what is PERP and GLOVE, but anyway, in GanttProject days off are just yellow bars on the chart. They do not carry any meaning to the scheduling algorithms, sorry.