https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67804#M20409 Hi Gourav, That's a validation that is (at least in my installation) set to Severity 'Warning', which you can ignore for now. It would be a good idea to adjust code over time to not use any deprecated methods, but I would be more concerned about validations with the Severity 'Error'. If you go to the System tab > Audit group > Design Control > Stage Validation > Advanced, the ""Expression... uses the function ..., which is deprecated"" warning can be changed to 'Advice' severity or unchecked completely. It's probably best not to change this. I only bring it up in case it's a requirement for you guys before code promotion is approved. Respectfully, Dave Mon, 08 Oct 2018 18:39:00 GMT david.l.morris 2018-10-08T18:39:00Z https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67798#M20403 I need to work out the number of weeks between 2 dates. In v5 I could use Datediff even though it said it going to be deprecated. It doesn't work at all in v6. What is the alternative? Thu, 12 Oct 2017 18:52:00 GMT https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67798#M20403 CarolLippert 2017-10-12T18:52:00Z https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67799#M20404 I'm using a beta version of 6.1 and datadiff still works for me, which is just as well as it would break a lot of stuff if support for it was suddently removed. DateDiff(1, [Date1], [Date2]) returned the number of weeks between the two dates. What are you seeing when you try to use it? Thu, 12 Oct 2017 19:27:00 GMT https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67799#M20404 Denis__Dennehy 2017-10-12T19:27:00Z https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67800#M20405 Is DateDiff() something to disappear in BP v6? Would be an important point to keep in mind when migrating from BP v5 to BPv6 Tue, 12 Jun 2018 01:42:00 GMT https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67800#M20405 AlexanderBopp 2018-06-12T01:42:00Z https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67801#M20406 No it will still be there, it's just recommended not to use it. Tue, 12 Jun 2018 18:50:00 GMT https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67801#M20406 John__Carter 2018-06-12T18:50:00Z https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67802#M20407 Do you need the number of days remainder as well? If you want to avoid DateDiff(), something like a calculation stage with [Date Start]-[Date End]/7 will give you number of weeks then it's your choice what to do with the remainder.  Fri, 15 Jun 2018 12:53:00 GMT https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67802#M20407 NicholasBell1 2018-06-15T12:53:00Z https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67803#M20408 Even i am facing same issue... my calculation stage with datediff funtion was working fine in v5. But when migrated to v6, its giving below error as below: The following errors exist: Expression uses the function DateDiff, which is deprecated   Let me know if you have any fix for it. Not sure if it is just a compilation error in calculation stage and will not occur in runtime. Mon, 08 Oct 2018 18:24:00 GMT https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67803#M20408 Anonymous 2018-10-08T18:24:00Z https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67804#M20409 Hi Gourav, That's a validation that is (at least in my installation) set to Severity 'Warning', which you can ignore for now. It would be a good idea to adjust code over time to not use any deprecated methods, but I would be more concerned about validations with the Severity 'Error'. If you go to the System tab > Audit group > Design Control > Stage Validation > Advanced, the ""Expression... uses the function ..., which is deprecated"" warning can be changed to 'Advice' severity or unchecked completely. It's probably best not to change this. I only bring it up in case it's a requirement for you guys before code promotion is approved. Respectfully, Dave Mon, 08 Oct 2018 18:39:00 GMT https://community.blueprism.com/t5/Product-Forum/Datediff/m-p/67804#M20409 david.l.morris 2018-10-08T18:39:00Z