I have a jpeg file which has 2D bar code. Image resolution is 1593X1212. I am using xing library to decode this barcode from image. I got following code on net.
I had the same problem, I was calling a readQRCode(filePath, charset, hintMap); and was getting the same message. I was calling a library I had written using the zxing libraries. To fix it just add the (zxing) jars to your top level code, even if the libraries are not accessed there.