> ## Documentation Index
> Fetch the complete documentation index at: https://docs.thrindex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# E0105 — EmptyModel

> The model has no layers.

<Warning>E0105: model has no layers</Warning>

## What happened

You called `thx.compile(model, ...)` with a `Sequential` that contains no layers.

## Why

An empty model has no input shape, no output shape, and no parameters. It cannot be compiled, serialized, or run.

## How to fix

Add at least one layer to the model before compiling:

```python theme={null}
model = snn.Sequential(
    snn.Dense(700, 512),
    snn.LIF(tau_mem=20.0, threshold=0.3),
    snn.Dense(512, 20),
    snn.LIF(tau_mem=20.0, threshold=0.3),
)
thx.compile(model, "model.thx")
```

## Example

```
E0105: model has no layers
Why: an empty Sequential cannot be compiled or simulated.
Fix: add at least one layer to the model before calling thx.compile().
Docs: https://docs.thrindex.com/errors/E0105
```