RuntimeError on generating descriptors

Hi, I always get a runtime error on generating descriptors. I have a file of 7000 molecules with their smile entries. It stops after a few SMILES and gives runtime error. I tried to increase the the runtime and no. of threads but it did not work.

for smile in tqdm(smiles):
desc = from_smiles(smile, fingerprints=False, descriptors=True, threads=4)
Descriptors.append(desc)