cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
Highlighted
powerbiuser132 Frequent Visitor
Frequent Visitor

Expression Error with Power Query List.Generate()

Hi,

 

I am trying to invoke a custom function in power query to check Next Scheduled Dates against todays date and add a specific interval if the date has alredy passed. The point of this procedure is to update next due dates for reoccuring tasks.

 

I used the List.Generate() function to create an iteration that adds a specific interval to the Next Due Date until the date is after today's date:

 

= (NextScheduledDate as date, NumberOfIntervals as number)=>
List.Generate(
()=>NextScheduledDate,
each _ < DateTime.Date(DateTime.LocalNow()),

Date.AddDays(NextScheduledDate,NumberOfIntervals)
)

 

However, when I try to invoke this function I get the following error:

 

An error occurred in the ‘Query2’ query. Expression.Error: We cannot convert the value #date(2019, 3, 19) to type Function.
Details:
    Value=3/19/2019
    Type=Type

 

NextDueDate is pulling from a date column and it appears that a date cannot be used as a function. Is there a way around this error?

 

Thank you!

3 REPLIES 3
Community Support Team
Community Support Team

Re: Expression Error with Power Query List.Generate()

Hi @powerbiuser132 ,

Based on my research, I am afraid this function could not just recognize the data value, you could refer to below link:

https://www.mattmasson.com/2014/02/creating-a-date-dimension-with-a-power-query-script/

And below link could help you solve the problem:

https://community.powerbi.com/t5/Desktop/Generate-Customer-Calendar-using-today-s-date-as-end-date/t...

= DateFunction(StartDate, Date.AddDays(DateTime.Date(DateTime.LocalNow()),1), null)

 

Regards,

Daniel He 

Community Support Team _ Daniel He
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
powerbiuser132 Frequent Visitor
Frequent Visitor

Re: Expression Error with Power Query List.Generate()

Thank you for the help, however I am not looking to create a custom calendar. I already have a column of Due Dates from my data source that I want to regularly update based on today's date and the task frequency (i.e. the due date is every 2 weeks, or every month..). The function should check the due date with today's date and add a certain amount of days until the due date is after today's date.

 

Thanks!

Community Support Team
Community Support Team

Re: Expression Error with Power Query List.Generate()

Hi  

 

Community Support Team _ Daniel He
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.