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FIX: Check for empty ACompCor results before trying to rename #2693

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FIX: Check for empty ACompCor results before trying to rename #2693

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11 changes: 9 additions & 2 deletions fmriprep/interfaces/confounds.py
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Original file line number Diff line number Diff line change
Expand Up @@ -125,6 +125,15 @@ class RenameACompCor(SimpleInterface):
output_spec = _RenameACompCorOutputSpec

def _run_interface(self, runtime):
try:
components = pd.read_csv(self.inputs.components_file, sep='\t')
metadata = pd.read_csv(self.inputs.metadata_file, sep='\t')
except pd.errors.EmptyDataError:
# Can occur when testing on short datasets; otherwise rare
self._results["components_file"] = self.inputs.components_file
self._results["metadata_file"] = self.inputs.metadata_file
return runtime

self._results["components_file"] = fname_presuffix(
self.inputs.components_file,
suffix='_renamed',
Expand All @@ -136,8 +145,6 @@ def _run_interface(self, runtime):
use_ext=True,
newpath=runtime.cwd)

components = pd.read_csv(self.inputs.components_file, sep='\t')
metadata = pd.read_csv(self.inputs.metadata_file, sep='\t')
all_comp_cor = metadata[metadata["retained"]]

c_comp_cor = all_comp_cor[all_comp_cor["mask"] == "CSF"]
Expand Down