Parsing error: unhandled.appenddecl: "dimension" not implemented

[SouthKoreaLN]

This is the output I'm getting. Not sure what led to this as it was correctly parsing and generating the html file before...
What does this error mean?

(base) nihao@MacBook-Pro-2 docs % make html                                   
Running Sphinx v3.2.1
loading pickled environment... done
parsing fortran sources...{'typespec': 'integer', 'attrspec': ['parameter']}
{'typespec': 'integer', 'attrspec': ['parameter']}
analyzevars: charselector={'len': '9'} unhandled.appenddecl: "dimension" not implemented.
 done
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 0 source files that are out of date
updating environment: 0 added, 0 changed, 0 removed
looking for now-outdated files... none found
no targets are out of date.
build succeeded.

The HTML pages are in _build/html.

Let me know if you'd need anything else.

[SouthKoreaLN]

Ok, it actually built the file. So not a problem, just wondering at this point what that "dimension" error means.