Hey,
I recently installed odmltables, and I was just running a quick test. I created a template.xls using the GUI and tried to convert it to odml (without changing anything). However, I keep on getting this issue:

An error occurred. This is the full error report:

Traceback (most recent call last):
File "C:\Users\eduar\Desktop\python\Bordeaux\Elephant_Course\python-odmltables\odmltables\gui\converterpages.py", line 1064, in handlebuttonbrowse
convert(self.settings)
File "C:\Users\eduar\Desktop\python\Bordeaux\Elephant_Course\python-odmltables\odmltables\gui\converterpages.py", line 1299, in convert
table.write2odml(settings.get_object('outputfilename'))
File "C:\Users\eduar\Desktop\python\Bordeaux\Elephant_Course\python-odmltables\odmltables\odml_table.py", line 830, in write2odml
doc = self.convert2odml()
File "C:\Users\eduar\Desktop\python\Bordeaux\Elephant_Course\python-odmltables\odmltables\odml_table.py", line 792, in convert2odml
setattr(doc, doc_attr_name, doc_attr_value)
File "C:\Users\eduar\anaconda3\envs\metadataenv\lib\site-packages\odml-1.5.1-py3.9.egg\odml\doc.py", line 118, in date
new_value = dtypes.date_set(new_value)
File "C:\Users\eduar\anaconda3\envs\metadataenv\lib\site-packages\odml-1.5.1-py3.9.egg\odml\dtypes.py", line 258, in date_get
return dt.datetime.strptime(string, FORMAT_DATE).date()
TypeError: strptime() argument 1 must be str, not float

It goes away if I remove the date of creation of the xls (first row).
I tried several things, changing the cell format, the way it was written, but then complains about not following the %Y-%m-%d