Improve error message for unexpectedly repeated fields

core/src/main/scala/eu/nomad_lab/h5/SectionH5.scala

@@ -168,7 +168,7 @@ case class SectionH5(
       case 1 =>
         Some(vColl.head)
       case l =>
-        throw new CalculationH5.CalculationH5Error(s"cannot get maybeValue for $this as it is repeated and has $l repetitions")
+        throw new CalculationH5.CalculationH5Error(s"cannot get maybeValue for $metaName from $this as it is repeated and has $l repetitions")
     }
   }