No code found for stream [nameofstream1] ~> [nameofstream2]

Question

Hello

I'm doing a preview on a data flow that is calling a flowlet. There is no validation error on the flowlet and all the modules display correctly but when I try preview I get the above error. Does anyone know what it could be?

Answer 1

@V I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others "I'll repost your solution in case you'd like to accept the answer.

Ask: I'm doing a preview on a data flow that is calling a flowlet. There is no validation error on the flowlet and all the modules display correctly but when I try preview I get the above error. Does anyone know what it could be?

Solution: I ended moving everything back to dataflow to get it to work.

If I missed anything please let me know and I'd be happy to add it to my answer, or feel free to comment below with any additional information.

If you have any other questions, please let me know. Thank you again for your time and patience throughout this issue.

---

Please don’t forget to Accept Answer and Yes for "was this answer helpful" wherever the information provided helps you, this can be beneficial to other community members

Answer 2

Hi @V
Welcome to Microsoft Q&A platform and thank you for reaching out.
It seems like you are encountering an error message "No code found for stream [nameofstream1] ~> [nameofstream2]" while doing a preview on a data flow that is calling a flowlet. This error message usually occurs when there is a mismatch between the output of one module and the input of another module in the data flow.

Here are a few things you can check:

• Make sure the inputs and outputs of your flowlet are set up correctly. If the names don’t match, it can cause this error.
• Sometimes, turning off and then turning on the Data Flow Debug feature can help fix issues with previews.
• If your flowlet uses parameters, double-check that they are set correctly and being passed properly.
• If preview isn’t working, try running the whole pipeline instead to see if it executes without errors.

If none of the above step's work, please provide more information about your data flow and flowlet so that I can assist you better.