basic-lib/src/main/java/com/streamsets/pipeline/stage/processor/fieldorder/FieldOrderProcessor.java
private String toFieldName(String fieldPath) {
    String path = fieldPath.substring(1).replaceAll("/", ".");
    path = "/" + path;
    return EscapeUtil.getLastFieldNameFromPath(path);
  }
private String toFieldName(String fieldPath) {
    String path = fieldPath.substring(1).replaceAll("/", ".");
    path = "/" + path;
    return EscapeUtil.getLastFieldNameFromPath(path);
  }
Remove initial "/", replace all other slashes with dots