Hi Bart,

Thank you for your answer. Sorry if I wasn't precise enough. I have uploaded a new picture because last one was not showing what I wanted properly. What I am trying to do is this: I will register project numbers that I have worked on each day. If one day I have worked with more than one project I will separate them with /. If the next day I have worked with one project that I have already entered in the excel sheet I don't want it to be counted. That is why the cell "Number" on the 4th row displays a 0, because project 76325 was previously entered on row number 2. Please let me know if you need me to clarify something else and many many thanks for your help. And happy new year!!