Confusing error message for missing outputs

[vchahun]

I don't know if this is still an issue in the current version, but I can't parse the following sentence:

ERROR: Output aer_parallel at source task aer_data for required by input aer_parallel at task download not found. Candidates are: train_parallel

I would prefer something like:

ERROR: Output "aer_parallel" at task "aer_data" cannot be found (required by "aer_parallel" for input)