FuncADL .Where() selection on event-level flat 1D arrays fails

[ArturU043]

When building queries in FuncADL_Uproot one can add multiple Where() clauses before a final Select() to cut events.

To do so one writes something like Where(e[some_branch].Where(lambda_cuts).Count()>0).

This works fine over a branch like "jet_pt_NOSYS".

But when I run this over a branch that doesn't have a nested structure, the .Count() still results in a read over the inner (sub-event-level) elements of the branch and fails because it exceeds existing dimensions.

Here is a reproducible example notebook with pixi env with the trasnformer error log copied

I FuncADL meant to be used in another way to write selections for event-level branches? It would be better to keep the exact same syntax.

[gordonwatts]

Wouldn't a .Count() at that level be trying to count the number of events? What are you trying to count there? What is it you are trying to accomplish.

Given how func_adl operates, I think this is expected behavior. .Count() needs a sequence to count. <int>.Count() doesn't really make sense.