Hi, Any idea what causes this error when building a yield curve?
Exception in thread “main” java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:770)
at com.google.common.collect.SingletonImmutableList.(SingletonImmutableList.java:36)
at com.google.common.collect.ImmutableList.of(ImmutableList.java:75)
at com.opengamma.strata.pricer.curve.CurveCalibrator.calibrate(CurveCalibrator.java:208)