Non-existing variable name in ValueError message results in NameError being raised instead

[lbianchi-lbl]

We've encountered this while working on DISPATCHES (see gmlc-dispatches/dispatches#119 (comment)).

My understanding is that the _read_metadata() function correctly detected that the simulation_objects.csv file was missing, but the error message refers to a non-existing variable which causes a NameError to be raised:

Egret/egret/parsers/rts_gmlc/parser.py

Lines 154 to 157 in 12e3757

	def _read_metadata(base_dir:str) -> pd.DataFrame:
	metadata_path = os.path.join(base_dir, "simulation_objects.csv")
	if not os.path.exists(metadata_path):
	raise ValueError(f'RTS-GMLC directory "{rts_gmlc_dir}" does not contain expected CSV files.')