Error "Incompatible result matrix."

[simpler23]

Hi, I've got an error "Incompatible result matrix." from the below method.
I'm using KalmanRx 2.0.0 version and kotlin.

public Matrix gemm(Matrix B, Matrix C, double alpha, double beta) {

    // m = rows;
    // n = columns;
    int p = B.n; // columns of B

    // cannot change C :(
    Matrix X = new Matrix(m, p); // X ~ C

    if (C == null) { // multiplication - rare, but necessary :(

        if (B.m != n) {
            throw new IllegalArgumentException("Matrix inner dimensions must agree.");
        }
       ....
      if (C.m != m || C.n != p) {
            **throw new IllegalArgumentException("Incompatible result matrix.");**
        }

---

My code is

val positionList: List = ...

KalmanRx.createFrom2D(rx.Observable.from(positionList.map { floatArrayOf(it.latitude.toFloat(), it.longitude.toFloat()) }))
.toList().subscribe { Log.i("tag", "arrived list: ${it}") }

I want to smooth the above list(val positionList).
What am I wrong?

This is a sample list value

(37.499884, 127.0351041) (37.4998852, 127.0351025) (37.4998853, 127.0351035) (37.4998876, 127.0351058) (37.4998904, 127.035109) (37.4998883, 127.035104) (37.4998849, 127.0351032) (37.4998897, 127.0351096) (37.4998857, 127.0351054) (37.4998844, 127.0351039) (37.4998843, 127.0351034) (37.4998899, 127.0351096) (37.4998858, 127.0351052) (37.4998845, 127.035104) (37.4998898, 127.0351097) (37.4998856, 127.0351049) (37.4998843, 127.0351036) (37.4998898, 127.0351096) (37.4998856, 127.035105) (37.4998841, 127.0351032) (37.4998842, 127.0351037) (37.4998899, 127.0351098) (37.4998858, 127.0351052) (37.4998844, 127.0351037) (37.4998843, 127.0351036) (37.4998845, 127.0351037) (37.4998846, 127.0351039) (37.4998901, 127.0351099)

Thank you and sorry for my poor English