define_variable_metadata doesn't function when data is in Excel format. (It works when data is in XPT format).
- Internally, file path to define.xml is set as "define.xml" (just file name, without any additional path). I confirmed it in Log file.
- Path to define.xml file is generated from path to dataset.
- In Excel format reader, path to dataset is just file name (ex. ae.xpt. not like "testdata/ae.xpt")
Some adjustment is required.