Unable to view/edit CDI via remote JMRI LCC hub

[dwightkelly]

Description
When connecting to a remote JMRI LCC hub, the Configuration Variable Interface (CDI) fails to load correctly for selected nodes. While the node's user name is successfully retrieved and displayed, the expansion of the node does not show the expected configuration categories.

Steps to Reproduce

1. Connect to a remote JMRI LCC hub.
2. Open the Network Tree or Configure Nodes view.
3. Locate a node and click the chevron to expand it.
4. Observe the displayed categories and the resulting data when a category is selected.

Expected Behavior
The UI should display the formatted CDI categories (e.g., "Buttons," "Events," "Output Settings") as defined in the node's XML. Clicking a category should open the standard configuration editor.

Actual Behavior
Instead of CDI categories, the list displays entries labeled "Space 2nn" (e.g., Space 253, Space 255).

Selecting one of these "Space" entries displays a raw, unformatted list of key/value pairs rather than the structured CDI interface.

This suggests the tool is falling back to raw memory space access instead of parsing the CDI XML.

Environment
Connection Type: Remote JMRI LCC Hub
Protocol: LCC (Layout Command Control)

[JohnSL]

This issue predates the current architecture, which has had significant CDI and TCP reliability improvements since then. When the CDI download failed over remote TCP connections, the UI fell back to listing raw memory spaces (Space 253, Space 255, etc.) instead of parsed CDI categories.

Fixes applied since this was filed:

• CDI download corruption fix — single subscription held for entire download, stale reply detection
• TCP timeout extensions for slower remote connections
• Transport reliability improvements for TCP

Additionally, if CDI download does fail today, the UI shows a clear error message rather than falling back to raw memory space entries.

Could you try again with the current version and let us know if the issue persists?

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