Dear all

I want to count, the highest number of days without “errors” in the table below (this is a subset of the overall table).

"Yes" means no error and "NO" means one or more errors.
The table is dynamic and gets data from underlying tables.

I want an automatic counting, showing the highest number of days without error. As an example in this table, there is a continuous period from 09.nov to 13.nov without error - 5 days.
This number should only be overwritten when a continuous period of “YES’s” is higher.

- Thank you in advance for your help. Best Hans

Date Check
05. nov 2013* Yes
06. nov 2013* Yes
07. nov 2013* Yes
08. nov 2013* No
09. nov 2013* Yes
10. nov 2013* Yes
11. nov 2013* Yes
12. nov 2013* Yes
13. nov 2013* Yes
14. nov 2013* No
15. nov 2013* Yes
16. nov 2013* Yes
17. nov 2013* No
18. nov 2013* Yes
19. nov 2013* Later
20. nov 2013* Later
21. nov 2013* Later