UnboundLocalError: local variable 'abs_name' referenced before assignment

When I first run the command,
```
python ${FAI_PEP_DIR}/benchmarking/run_bench.py -b "${BENCHMARK_FILE}" --config_dir "${CONFIG_DIR}"
```
I encounter this message.
"UnboundLocalError: local variable 'abs_name' referenced before assignment"

However, when I ran the same command again, it disappears. I doubt .md5 autogeneration somehow broke at the first time. 