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No, it works fine for me. That doesn't look like is a stack output / input problem, it looks like you're assigning a value to a field that shouldn't have a value assigned (e.g. ARN).

<@U012UJTT55M> that’s weird… I’ve imported a few resources from my AWS account to `stackA` and trying to use them in `stackB` by using the `stackReference` feature. Why does it fail? The resources exists (as I imported them)

<@U012UJTT55M> I’m even trying to hardcode the values but I still get the same error message. How can it be :thinking_face:

Yes, it isn't to do with the stack references (since the hardcoded values have the same problem).

Have you already finished importing the resource? It's now in your stack?

Is the _import_ opt still set? You need to remove that after the import is complete.

(Not relevant if you imported using _pulumi import_)

Can you copy the code where you create the lambda?

The error message suggests that there's a `lambda.vpcConfig[0].vpcId`, which isn't correct. Is that in your code?

What I have is the following config on the lambda:

```vpcConfig = {
  vpcId: 'vpc-id-of-vpc',
  subnetIds: ['subnet-0x9173283495'],
  securityGroupIds: ['sg-jdfg93457345'],
};```


Omitting the `vpcId` does not give me this error anymore

I’ve checked that the ID is correct many many times. What could be the issue :confused:

It looks like there's an array going into the json sent to the AWS API.. seems unlikely, but that's how I read the error message..

Looks like you're using weakly-typed javascript? Rather than TypeScript?

Maybe that's possible with javascript.. not sure.

```{
        /**
         * List of security group IDs associated with the Lambda function.
         */
        securityGroupIds: pulumi.Input&lt;pulumi.Input&lt;string&gt;[]&gt;;
        /**
         * List of subnet IDs associated with the Lambda function.
         */
        subnetIds: pulumi.Input&lt;pulumi.Input&lt;string&gt;[]&gt;;
        vpcId?: pulumi.Input&lt;string&gt;;
    }```

You're not doing anything like `func.vpcConfig[0] = vpcConfig`? Because that's the only thing I can think of. If that's not it, then you'll need someone smarter than me...\

you’re smart enough! I’m not doing this kind of assignment :confused: