Even with the beta2 release, if I try and specify "--gpu-platform 1" it exits with no error message.
According to sgminer FAQ: " Run sgminer with the -n option and it will list all the platforms currently installed. Then you can tell sgminer which platform to use with --gpu-platform."
[01:42:38] CL Platform vendor: NVIDIA Corporation
[01:42:38] CL Platform name: NVIDIA CUDA
[01:42:38] CL Platform version: OpenCL 1.2 CUDA 9.2.147
[01:42:38] Platform devices: 1
[01:42:38] 0 GeForce GTX 1050
[01:42:38] 1 GPU devices max detected
It's not recognizing the 2nd platform. I have 3 AMD devices installed (Vega 56, RX 580, RX 560)