`btcli w transfer --all` flag fails with UnknownError(UnknownType)

[distributedstatemachine]

Description:

Bug Description

The --all flag for btcli w transfer command fails with a Subtensor error, while manual amount specification works correctly.

Steps to Reproduce

1. Run transfer command with --all flag:

btcli w transfer --wallet.name my_wallet --all --dest 5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY

Expected Behavior

Transfer should proceed with the full wallet balance (minus fees)

Actual Behavior

Command fails with:

❌ Failed: Subtensor returned `UnknownError(UnknownType)` error. This means: `Unknown Description`.

Workaround

Manually specifying the amount works:

btcli w transfer --wallet.name my_wallet --dest 5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY
# Then enter amount when prompted

Environment

• Network: finney
• btcli version: 9.5.1
• OS: Darwin

[thewhaleking]

Resolved by #562