unknown unit system "{system}"; known systems are {list}

Warnings reference › unit:system:*

Identifier

unit:system:*

Raised by

The grid (core)

Since

1.6.0

What happened

A unit column named a measurement system that is not registered, so no unit index could be built. The column has no units at all: values render as plain numbers and no conversion happens.

The fix

Use one of the systems listed in the message.

The smallest fix

columns: [{ id: 'size', type: 'unit', unit: { system: 'data', unit: 'B' } }]

Reference

Covered in full at the API reference.