[cx-oracletools-users] error in exporting table?

Anybody seen this?  using oracle 11, most recent download of cx_OracleTools.

many TIA,
Mark.

DescribeSchema --schema=mh/foo

...

create table a_h (
   x                               number,
   y                               varchar2(10),
   "zztop"                         date,
   h_tmstamp                       timestamp(6),
   h_scn                           number,
   h_username                      varchar2(16),
   h_changetype                    varchar2(1),
   h_osuser                        varchar2(16),
   h_machine                       varchar2(16)
13:30:55.681 TypeError: %d format: a number is required, not NoneType



ohm ~$ ExportObjects --schema=mh/foo
Describing synonyms...
Describing sequences...
Describing tables...
13:31:37.107 TypeError: %d format: a number is required, not NoneType