error: function 'read_channel_altera' is not supported by the Intel(R) FPGA SDK for OpenCL(TM), and no user definition is provided

Hello,

if you are migrating your kernel from older OpenCL SDK to a newer one, I assume this is due to the old name of the API used. Try to change write_channel_altera to write_channel_intel and read_channel_altera to read_channel_intel, and let me know if this could fix the error.

Thank you.