Hi bros, I am new comer with Meltano and trying to run a 1st test pipeline from tap-postgres to target-postgres. When running

meltano run tap-postgres target-postgres

(locally), I am getting the following error

[error    ] Block run completed.           block_type=ExtractLoadBlocks err=RunnerError('Loader failed') exit_codes={<PluginType.LOADERS: 'loaders'>: 1} set_number=0 success=False
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Run invocation could not be completed as block failed: Loader failed

I just try another version of environment (python3.11 >> 3.10 >> 3.9) but the same issues, don’t know how go through yet. Pls support. P/S: I am using: python3.10, meltano==3.6.0, dbt 1.9.1 Thank you 🙏

I don't think this is an installation issue, so using

uv

probably won't help fixing it. Here's a quick loader debugging tip that I hope to formalize or document at one point: 1.

meltano invoke tap-postgres > tap-postgres.singer.jsonl

2.

cat tap-postgres.singer.jsonl | meltano invoke target-postgres

And share the results here

Totally agree with you that is not an installation issue by using

pip

or

uv

. After logs exploration and debugging, I had found the root cause came from ingestion schema. Go through by adding catalog config

catalog: ./extract/tap-local-postgres.json

(in

meltano.yml

file) which describes the schema of tap-postgres source that serve for downstream loader. Thank you for your comment @Edgar Ramírez (Arch.dev)