Dear,

In this situation, there are two possibilities,

1) What's your operating system, 'at' command should be enabled in your system.
     But at first time, you can run to BET_1, maybe it is not the reason.

2) The input data is not organized correctly, the organization of input of PANDA has a certain rule.

PS: 13 days ago, you have sent an e-mail to cuizaixu19891201@gmail.com.
       However, this is not my usually used e-mail. 
       I haven't seen your e-mail until yesterday.
       Please send e-mail to zaixucui@gmail.com, I will reply you as soon as possible.

Best,

Zaixu