> EC_GROUP* group = EC_GROUP_new_by_curve_name (NID_secp256k1); > "c16b4ce0532f5dc9d09114fe121d3956ae84f9eb677a0d4bdac1d3af7a91950c"; I don't believe there's a point on secp256k1 with that x-coordinate. If you check the failure reason for EC_POINT_set_compressed_coordinates_GFp in the debugger, that is probably what it is telling you. Where did this curve / x-coord pair come from? BBB
