Making Changes to Specifications

Hello All,

Here's my question. For a real substance, I entered values to the property tree characteristics and in the 'Status Tab' made the staus to Released with validity from today to 15 days in advance. When I go on the 20th day to make changes to these values, the values are greyed out and it does not let me make changes. I have tried this both the ways with and without Change numbers. How to make this working?,

thanks in advance,

Sachin