new-vm : Failed to add device 'Synthetic Disk Drive'. Windows 10 Hyper-V

Creating VMs using PowerShell and I get this problem:

new-vm : Failed to add device 'Synthetic Disk Drive'.

I have created the VMs in the GUI but I seemed to strike out with PowerShell

new-vm-NameWin2012r2-SC01-MemoryStartupBytes2gb-BootDeviceCD-SwitchNameWAN-Generation2-NewVHDPath'D:\HVStore\VM\Win2012r2-SC01\Virtual Hard Disks\Win2012r2-SC01.vhdx'-NewVHDSizeBytes40gb-Path'D:\HVStore\VM'

Thanks