Zenbot terminated and there is an exception in log

[rgf2004]

While running zenbot, it sometimes terminates with the following exception

2017-08-10 07:51:56 299.900 USDT-ETH +0.3% 5 0.0000 0.1000 0.05 USDT 0.01569 ETH +31.6% +29.8%undefined
undefined
undefined
undefined
undefined
2017-08-10 07:57:10 300.000 USDT-ETH +0.3% 92 0.0000 0.1000 0.05 USDT 0.01569 ETH +31.6% +29.8%undefined
/home/pi/tradingBots/zenbot/node_modules/numbro/numbro.js:1111
var parts = x.toString().split('.');
^

TypeError: Cannot read property 'toString' of undefined
at multiplier (/home/pi/tradingBots/zenbot/node_modules/numbro/numbro.js:1111:22)
at /home/pi/tradingBots/zenbot/node_modules/numbro/numbro.js:1127:22
at Array.reduce (native)
at correctionFactor (/home/pi/tradingBots/zenbot/node_modules/numbro/numbro.js:1125:21)
at Object.add (/home/pi/tradingBots/zenbot/node_modules/numbro/numbro.js:1197:47)
at /home/pi/tradingBots/zenbot/commands/trade.js:234:78
at /home/pi/tradingBots/zenbot/lib/engine.js:191:14
at /home/pi/tradingBots/zenbot/extensions/exchanges/bittrex/exchange.js:113:18
at Request._callback (/home/pi/tradingBots/zenbot/node_modules/node.bittrex.api/node.bittrex.api.js:112:25)
at self.callback (/home/pi/tradingBots/zenbot/node_modules/request/request.js:188:22)
at emitOne (events.js:96:13)
at Request.emit (events.js:188:7)
at Request.onRequestError (/home/pi/tradingBots/zenbot/node_modules/request/request.js:884:8)
at emitOne (events.js:96:13)
at ClientRequest.emit (events.js:188:7)
at TLSSocket.socketErrorListener (_http_client.js:309:9)
at emitOne (events.js:96:13)
at TLSSocket.emit (events.js:188:7)
at emitErrorNT (net.js:1277:8)
at _combinedTickCallback (internal/process/next_tick.js:80:11)
at process._tickCallback (internal/process/next_tick.js:104:9)

[DeviaVir]

duplicate of #457