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How to debug sdk infer wrong result?

Hi, I have a pre-trained inceptionv3.pb file, and convert to graph file successfully without error.

But the infer result is all NaN in python.

Debug log didn't help anything.

Start download to NCS...
D: [         0] ncFifoWriteElem:2592    No layout conversion  is needed 0

D: [         0] convertDataTypeAndLayout:170    src data type 1 dst data type 0

D: [         0] convertDataTypeAndLayout:172    SRC: w 299 h 299 c 3 w_s 12 h_s 3588 c_s 4

D: [         0] convertDataTypeAndLayout:174    DST: w 299 h 299 c 3 w_s 6 h_s 1794 c_s 2

D: [         0] ncFifoWriteElem:2617    write count 0 num_elements 2 userparam 0x7fb0fc143cd0

I: [         0] ncGraphQueueInference:3048  trigger start

I: [         0] ncGraphQueueInference:3145  trigger end

D: [         0] ncFifoReadElem:2686 No layout conversion  is needed 1

D: [         0] convertDataTypeAndLayout:170    src data type 0 dst data type 1

D: [         0] convertDataTypeAndLayout:172    SRC: w 1 h 1 c 4 w_s 8 h_s 8 c_s 2

D: [         0] convertDataTypeAndLayout:174    DST: w 1 h 1 c 4 w_s 16 h_s 16 c_s 4

D: [         0] ncFifoReadElem:2714 num_elements 2 userparam 0x7fb0fc143ef0 output length 16

Cost: 0.35880494117736816
output data is:
[ nan  nan  nan  nan]
*******************************************************************************
inception-v3 on NCS
*******************************************************************************
[3 2 1 0]
3 3:yumi nan
2 2:tudou nan
1 1:shulin nan
0 0:huangdi nan

I don't know where to start with, someone any suggestion?

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