what is this error ? RangeError (index): Invalid value: Not in inclusive range 0..9638: 9639

[TamirlanBir]

RangeError (index): Invalid value: Not in inclusive range 0..9638: 9639

I am trying to screenshot and print this image , but this error shows

full
await controller.capture().then( (value) async { setState(() { theimageThatComesfromThePrinter = value; }); final im.Image ims = im.decodeImage(theimageThatComesfromThePrinter!)!; bytes += generator.imageRaster(ims);