Amazon comprehend PII detection job: Error parsing parameter 'cli-input-json': Invalid JSON received.

Question

I am trying to run a pii detection job using the command

```
aws comprehend start-pii-entities-detection-job \
    --region us-east-1 \
    --job-name pii_test\
    --cli-input-json input.json
```
But I get the error

```
Error parsing parameter 'cli-input-json': Invalid JSON received.
```
My json is formatted correctly as far as I can tell. Has anyone seen this before or know a fix? Thanks

Answer

The `--cli-input-json` option takes the actual JSON document as its value, not a filename. You need to use `file://input.json`, which will make the CLI read the value from the file.

(Had a brainwave a while after posting my initial comment above!)

Amazon comprehend PII detection job: Error parsing parameter 'cli-input-json': Invalid JSON received.

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