RangeError [ERR_OUT_OF_RANGE]: The value of "offset" is out of range.

[kirankandel]

Using method bwipjs.toBuffer(options, (err,png) => {})
I'm using options :

bcid: 'code39'
paddingheight: 7.760141093474427
paddingwidth: 7.760141093474427
width: 70.54673721340389
height: 35.27336860670194

bwip-js version : 4.3.2

[metafloor]

Padding values are integer points. I will update the code for the next release to enforce this.