Pass value from child to parent pipeline

Hi girishtharwani2 
Sorry for the late response and inconvenience cause. 
Please try the above step by step again and confirm if your issue has been resolved?
If you are still facing any challenges, kindly provide further details, and we will be happy to assist you.

If the above information is helpful, please give us Kudos and mark the response as Accepted as solution.

Best Regards,
Community Support Team _ C Srikanth.

Hi girishtharwani2 
Could you please refer the below link which is the similar issue earlier the community member faced and resolved his issue.
Ref link: https://community.fabric.microsoft.com/t5/Data-Pipeline/Passing-a-variable-from-one-pipeline-to-another/m-p/4256583 |

If the above information helps you, please give us a Kudos and marked the Accept as a Solution.

Thanks,
Cheri Srikanth

v-csrikanth Unfortunately it is not helpful

Hi girishtharwani2 
I have replicated your scenario, and it works fine for me when the data type is set to "String".
After changing the data type to String, save the pipeline and rerun it.

Please refer the below screenhot for reference.

Thanks and Regards,
Cheri Srikanth

Hi girishtharwani2 
It's been a while since I heard back from you and I wanted to follow up. 
If the issue has been resolved, can you mark the post as resolved.
If you're still experiencing challenges, please feel free to let us know and we'll be happy to continue to help!
Looking forward to your reply!

Thanks 
Cheri Srikanth

Hi girishtharwani2 

We haven't heard from you since last response and just wanted to check whether the solution provided has worked for you. If yes, please Accept as Solution to help others benefit in the community.
Thank you.

If the above information is helpful, please give us Kudos and mark the response as Accepted as solution.
Best Regards,
Community Support Team _ C Srikanth.