Error when trying to write new data to existing file

[luiztauffer]

I'm getting this error when adding new data to an existing file and trying to write it. I'm not sure if it's relevant, but this happens just the same to file with or without external links.
It happens on both hdmf==1.1.0 and hdmf=1.0.5.post0.dev14.
The error goes away and writing works fine on hdmf==1.0.5.

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-10-90c1f5fb09a5> in <module>
     45 
     46     #print(nwb)
---> 47     io.write(nwb)

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\utils.py in func_call(*args, **kwargs)
    412                         raise_from(ExceptionType(msg), None)
    413 
--> 414                 return func(self, **parsed['args'])
    415         else:
    416             def func_call(*args, **kwargs):

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\backends\hdf5\h5tools.py in write(self, **kwargs)
    217 
    218         cache_spec = popargs('cache_spec', kwargs)
--> 219         call_docval_func(super(HDF5IO, self).write, kwargs)
    220         if cache_spec:
    221             ref = self.__file.attrs.get(SPEC_LOC_ATTR)

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\utils.py in call_docval_func(func, kwargs)
    305 def call_docval_func(func, kwargs):
    306     fargs, fkwargs = fmt_docval_args(func, kwargs)
--> 307     return func(*fargs, **fkwargs)
    308 
    309 

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\utils.py in func_call(*args, **kwargs)
    412                         raise_from(ExceptionType(msg), None)
    413 
--> 414                 return func(self, **parsed['args'])
    415         else:
    416             def func_call(*args, **kwargs):

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\backends\io.py in write(self, **kwargs)
     39     def write(self, **kwargs):
     40         container = popargs('container', kwargs)
---> 41         f_builder = self.__manager.build(container, source=self.__source)
     42         self.write_builder(f_builder, **kwargs)
     43 

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\utils.py in func_call(*args, **kwargs)
    412                         raise_from(ExceptionType(msg), None)
    413 
--> 414                 return func(self, **parsed['args'])
    415         else:
    416             def func_call(*args, **kwargs):

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\build\map.py in build(self, **kwargs)
    168                 # TODO: if Datasets attributes are allowed to be modified, we need to
    169                 # figure out how to handle that starting here.
--> 170                 result = self.__type_map.build(container, self, builder=result, source=source, spec_ext=spec_ext)
    171         return result
    172 

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\utils.py in func_call(*args, **kwargs)
    412                         raise_from(ExceptionType(msg), None)
    413 
--> 414                 return func(self, **parsed['args'])
    415         else:
    416             def func_call(*args, **kwargs):

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\build\map.py in build(self, **kwargs)
   1658         builder.set_attribute('namespace', namespace)
   1659         builder.set_attribute(attr_map.spec.type_key(), data_type)
-> 1660         builder.set_attribute(attr_map.spec.id_key(), container.object_id)
   1661         return builder
   1662 

~\Anaconda3\envs\ecog_vis\lib\site-packages\hdmf\utils.py in func_call(*args, **kwargs)
    410                     if parse_err:
    411                         msg = ', '.join(parse_err)
--> 412                         raise_from(ExceptionType(msg), None)
    413 
    414                 return func(self, **parsed['args'])

~\AppData\Roaming\Python\Python37\site-packages\six.py in raise_from(value, from_value)

TypeError: incorrect type for 'value' (got 'NoneType', expected 'NoneType')

[luiztauffer]

I installed #115, the error is gone and the data gets written alright!
It seems to be working fine now, thanks! (leaving this open until it get's merged)