The tflite model conversion has an unsupported operator structure. Is there any way?

[luxingran]

---- Tengine Convert Tool ----

Version : v1.0, 17:35:03 Jun 30 2021
Status : float32
These 3ops are not supported
{REDUCE_MAX,EXP,SUM,}
Create graph failed

[Harper812]

I have the {SUM,} error too!