Look up Consul-Terraform-Sync error message to learn how to resolve potential issues using CTS.
---
# Error Messages
This topic explains error messages you may encounter when using Consul-Terraform-Sync (CTS).
## Example error log messages
If you configured the CTS cluster to run in [high availability mode](/docs/nia/usage/run-ha) and the the local module is missing, then the following message appears in the log:
```shell-session
[ERROR] ha.compat: error="compatibility check failure: stat ./example-module: no such file or directory"
The resolution is to add the missing local module on the incompatible CTS instance. Refer to the [`module` documentation](/docs/nia/configuration#module) in the CTS configuration reference for additional information.
"message": "redirect requests to leader 'cts-01' at cts-01.example.com:8558"
}
}
```
The resolution is to redirect the request to the leader instance, for example:
```shell-session
$ curl --request GET cts-01.example.com:8558/v1/tasks
```
---
In the following example response error:
* CTS can determine the leader.
* The CTS instance you sent the request to is not the leader.
* `high_availability.instance.address` is not configured.
```json
{
"error": {
"message": "redirect requests to leader 'cts-01'"
}
}
```
The resolution is to identify the leader instance address and redirect the request to the leader. We recommend deploying a cluster that has three instances. You can query each instance until the leader responds.
---
In the following example response error:
* The CTS instance you sent the request to is not the leader.
* The CTS is unable to determine the leader.
* Note that these conditions are rare.
```json
{
"error": {
"message": "redirect requests to leader"
}
}
```
The resolution is to identify and send the request to the leader CTS instance. You can identify the leader by either making a call to the [`status` API endpoint](/docs/nia/api/status) or by checking the logs for the following entry:
