Fixed minor errors in readPvl

                        + "] is not supported";

          throw IException(IException::Unknown, msg, _FILEINFO_);

      }

      version = toInt(controlNetwork["Version"][0]);

      if (version == previousVersion) {

        IString msg = "Cannot update from version [" + IString(version) + "] "

            "to any other version";

          throw IException(IException::Programmer, msg, _FILEINFO_);

      }

      return LatestPvlToBinary(controlNetwork);

  }