translytical-task-flow button not working?

Hi paulos​,

When the parameter list does not appear after choosing the function, it is almost always one of the prerequisites rather than the button itself. The checklist I go through:

1. Desktop preview feature on
   File > Options > Preview features > "Translytical task flows" (restart Desktop)
2. Tenant settings (Fabric admin portal)
   "Users can create Fabric items" + user data functions enabled for you
3. The user data function is PUBLISHED, not just saved
   (open the function item > Publish, wait for it to complete)
4. You can see that workspace and function with the account signed in to Desktop
5. Button > Action > Type = Data function
   -> Workspace -> Function set -> Data function
   -> parameters should now list; map each with fx (measure / slicer field)
6. Parameter types are supported ones (str, int, float, bool, datetime)
   and the function signature has no errors

A minimal function to test the wiring end to end (publish this, then pick it in the button):

import fabric.functions as fn

udf = fn.UserDataFunctions()

@udf.function()
def hello_param(name: str, amount: int) -> str:
    return f"Received {name} with {amount}"

If this test function shows its two parameters in the button but your real one does not, the issue is in the real function (usually an unsupported type, a default value pattern, or it was not republished after editing). Also note the report needs to be published to the Service to actually run the action; Desktop is only for wiring it up.

So my overall approach would be:

Enable the preview feature + tenant settings
-> Publish the user data function
-> Test with a 2-parameter hello function
-> Map parameters with fx, publish report, test in the Service

AI-assisted drafting: AI was used to help structure and phrase this response. I reviewed and validated the technical content before posting.