Subreport not displaying values

If you believe the subreport is correct, can you try moving the fields on the subreport from the PageHeader section to one of the group sections or the detail section and run a quick test to see if the results are visible?

It’s been awhile but I thought you are not able to bring in report/page headers and footer sections on a subreport into the main report - I typically use the group header/footer sections to bring information into the main report.

If that doesn’t solve your issue, I would view the Trace after printing the main report to see if there are any background errors when executing. At a glance, your parameters look good but sometimes there are issues when passing to a subreport, especially with Project ID field. I’ve found including a join to the PMProject DAC and then filtering by PMProject.ContractID or CD in the subreport usually resolves any issues there.

Hello @mbridges00 ,
I have established the following join in the subreport:
 

And the result of the subreport is displayed correct:
 

Now coming to the part of the main report,
I added the same subreport, with the same parameter :

Upon running the main report,
It only displays the text from the subreport, but not the values of a data field:
 

Also to mention here, the parameters being used for the main report, the external parameter and the one used in subreport are all same. 
 

I assume if the issue is related to the parameters part?
Attaching the trace after generating the main report:
 

Also attaching the XML file for both main & sub reports:
 

Thank you for sharing your solution with the community @Harshita!