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See `pulumi.interpolate`. 

<https://www.pulumi.com/docs/intro/concepts/programming-model/#outputs-and-strings|https://www.pulumi.com/docs/intro/concepts/programming-model/#outputs-and-strings>

Thanks <@UB3BGTV63>, I tried to use both `concat` and `interpolate` but it doesn’t make any effect, still getting same error

Although, I noticed that `interpolate` works within module where EIP resource is defined, but if I try to interpolate it in another module referenced via import {} then it fails

The only way I could make it work is to use `concat(stack.getOutput('outputId'))` , however my understanding always was that `getOutput()` is meant to be used for cross-stack references primarily, is my understanding wrong? Is it feasible to use `stack.getOutput()` within one stack?