Virtual Characteristic and filtering

Hello,

I created a virtual characteristic with RSR00002 that calculates a number of days an order has been in back order.

It works fine.

However, I now try to use this caracteristic to create a restricted key figure with a retriction on 'days in back order ' between 1 and 10.

The problem is that when I try to restrict on the virtual characteristic I only get # as available value.

I tried to add manually master data to the characteristic, but it does not show up in the query designer.

Can someone help me resolve this?