Troubleshooting AI model downloads and configuration

Fix missing model files and common AppServerX.xml misconfigurations.

Use this page when AppServer fails to start, or AI suggestions don't work.

Missing model files (model wasn’t downloaded)

Symptoms

You may see one of these errors in logs:

02/24/26:10:55:28.953	#13600:0	Subsystem_General	Critical	ConsoleMain: Std exception "Failed to open config file: grammar/neural/en/config.json"

02/24/26:10:56:14.142	#6876:0	Subsystem_General	Critical	ConsoleMain: Std exception "Failed to open config file: autocomplete/neural/en/config.json"

Cause

The AI model directory exists in config, but the model files are missing.

This usually happens when:

• the host had no outbound internet during installation

• files were copied partially during a manual/offline install

Fix

Pick one:

• Re-run installation and select the needed AI models.

• Install resources manually using the offline package.

Use: Manually downloading resources (offline installation)

“Encoder wasn’t found” after disabling the model

Symptom

02/24/26:10:59:17.785	#21640:6	Subsystem_General	Error	Unhandled exception in handleRequest(): Encoder wasn't found for 'en' model.

Cause

The model is disabled in AppServerX.xml under <AIModels>, but it is still referenced by an enabled language configuration.

Common sources of that dependency:

• an enabled check kit that includes <Neural Enabled="true" .../>

• an enabled <Autocomplete Enabled="true"> block

Fix options

Option A: Re-enable the model

If you still want AI features, re-enable the model in <AIModels> and ensure the model files exist.

Option B: Disable AI usage in language configuration (recommended)

If your goal is to turn off AI features, disable them where they are used:

1. Back up AppServerX.xml.

2. In AppServerX.xml, for each affected <Language ...>:

   • disable all check kits that include <Neural Enabled="true" .../>

   • make a non-AI check kit the default (for example, lt_hs)

   • to disable autocomplete, set <Autocomplete Enabled="false"> or remove the block

3. Disable the related model in <AIModels> (Enabled="false").

4. Restart the application

Restart AppServer to apply changes in AppServerX.xml.

To restart: stop the application, then start it again.

Use Main AppServer commands.

Example: why disabling a model can break a language

A language can reference AI features in its check kits and autocomplete settings. If these are enabled, AppServer will expect the matching model to be available.

<Language Id="en_US" Enabled="true">
  ...
  <SupportedCheckKits>
    <CheckKit Name="ai_lt_hs1" Default="true" Enabled="true" Parent="lt_hs">
      <Neural Enabled="true" Priority="3" Locale="en"/>
      ...
    </CheckKit>
  </SupportedCheckKits>

  <Autocomplete Enabled="true">
    <Locale>en</Locale>
  </Autocomplete>
</Language>

You can keep model files on disk after disabling AI. Remove model directories only after restart and log verification.