Unhandled AddOrder error, Invalid arguments:volume

[timstoop]

Just got this error while trading on Kraken:

{{{
2017-08-07 14:30:03 229.000 XETH-ZEUR +0.0% 4 60 ++ 229.0000218.9979 0.00 XETH 32.21440 ZEUR +0.5% +0.1% [17/439]
Unhandeld AddOrder error:
Error: Kraken API returned error: General:Invalid arguments:volume
at Request._callback (/app/node_modules/kraken-api/kraken.js:155:34)
at Request.self.callback (/app/node_modules/request/request.js:188:22)
at emitTwo (events.js:106:13)
at Request.emit (events.js:191:7)
at Request. (/app/node_modules/request/request.js:1171:10)
at emitOne (events.js:96:13)
at Request.emit (events.js:188:7)
at IncomingMessage. (/app/node_modules/request/request.js:1091:12)
at IncomingMessage.g (events.js:292:16)
at emitNone (events.js:91:20)
at IncomingMessage.emit (events.js:185:7)
at endReadableNT (_stream_readable.js:974:12)
at _combinedTickCallback (internal/process/next_tick.js:80:11)
at process._tickCallback (internal/process/next_tick.js:104:9)

{ Error:
order rejected
at /app/lib/engine.js:233:23
at KrakenClient. (/app/extensions/exchanges/kraken/exchange.js:253:20)
at Request._callback (/app/node_modules/kraken-api/kraken.js:155:23)
at Request.self.callback (/app/node_modules/request/request.js:188:22)
at emitTwo (events.js:106:13)
at Request.emit (events.js:191:7)
at Request. (/app/node_modules/request/request.js:1171:10)
at emitOne (events.js:96:13)
at Request.emit (events.js:188:7)
at IncomingMessage. (/app/node_modules/request/request.js:1091:12)
at IncomingMessage.g (events.js:292:16)
at emitNone (events.js:91:20)
at IncomingMessage.emit (events.js:185:7)
at endReadableNT (_stream_readable.js:974:12)
at _combinedTickCallback (internal/process/next_tick.js:80:11)
at process._tickCallback (internal/process/next_tick.js:104:9)
order:
{ id: null,
status: 'rejected',
price: '228.59000000',
size: '0.01409265',
created_at: 1502116197466,
filled_size: '0',
reject_reason: 'Kraken API returned error: General:Invalid arguments:volume' },
desc: 'could not execute buy: error placing order' }
}}}

This same build has bought ETH earlier todiay, though. The one thing I changed was setting --buy_pct to 10 instead of 50, what is was before.

[DeviaVir]

Looks like a dup of #422