nish-ant

Yes, either that or `i` can iterate over the indices of `tp`, keeping rest of the code unchanged : `for i in range(len(tp))`

The `trackForward` keyword was discontinued from OpenFOAM v1912 onwards, see [`OpenFOAM-v1912/src/functionObjects/field/streamLine/streamLine.H`](https://develop.openfoam.com/Development/openfoam/-/blob/OpenFOAM-v1912.200626/src/functionObjects/field/streamLine/streamLine.H). In the foundation version, it was supported till [v8](https://cpp.openfoam.org/v8/classFoam_1_1functionObjects_1_1streamLine.html) and discontinued from [v9](https://cpp.openfoam.org/v9/classFoam_1_1functionObjects_1_1streamlines.html) onwards. You can try introducing the...