# RegistryApplicationNotFoundException
## Format
RegistryApplicationNotFoundException
expected: EXPECTED_SERVICE
actual: NOT FOUND
## Cause by
The `RegistryApplicationNotFoundException` caused by one of application code that you write in the expected data file
cannot found in the actual data file.
## Check points
1. Check the application code is the value of `agent.service_name` that you configured.
e.g.,
the application that you write in the expected data file:
```
registryItems: {
"test_application": {
}
}
```
the application of `agent.service_name` that you configured:
`-Dskywalking.agent.service_name=another_application`
2. Check the agent of someone project in the test case if it works.