Go to URL not working in Paginated Reports

[smeg]

Hi ,

I created a paginated report in Power BI Report builder and created URL action item that needs to be redirected to another report .

The URL link is something like below where the customer number at end is taken from master report.

https://app.powerbi.com/groups/90d7ccccccccccc/rdlreps/3c1db4a40-a64?CustNum=CStr(Fields!CustNum.Val...

Master Report 

After I published  to power bi service and when i click on customer number in above master report ,it is successfully redirecting from above master report to another report   but not taking the customer number and display the results accordingly.at this point of time I am entering csutomer number SFM004 manually in below highlighted area.Then only it is working.

I need something that takes customer number automatically from master report.Is there something i am missing in URL link which I provided when giving customer value.

Can someone please help!

thanks..

[Jon-Heide]

Double check that the URL being created is correct. If you are using report parameters it needs to use this syntax: 

https://learn.microsoft.com/en-us/power-bi/paginated-reports/report-builder-url-parameters