terraform config_error ai_generated true

Error: Invalid count argument: The "count" value depends on resource attributes that cannot be determined until apply

ID: terraform/tf-count-cannot-be-computed

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82%Fix Rate

85%Confidence

85Evidence

2023-01-01First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
1	active	—	—	—

The count meta-argument depends on a value that is not known until apply time, which Terraform cannot handle.

generic

88% success Use a variable or local value that is known at plan time instead of a computed attribute
```
Replace count = resource.x.computed_value with count = var.known_count or a data source value
```
Sources: https://developer.hashicorp.com/terraform/language/meta-arguments/count
78% success Split into two separate Terraform configurations with a remote state data source
```
Apply the first config that produces the computed value, then reference it via terraform_remote_state in the second config
```
Sources: https://developer.hashicorp.com/terraform/language/state/remote-state-data

Common approaches that don't work:

Use -target to apply the dependency first 65% fail
Targeted applies create state drift and are not sustainable for ongoing operations
Wrap the count in a try() function 90% fail
try() handles errors, not unknown values; count must be known at plan time regardless

Leads to: