check failure stack trace

[Endeavour92]

Hi，shicai！
I used the Mobilenet to train my data ，i always meet the wrong infomation from the log：I1103 13:56:20.871213 2944 net.cpp:226] conv4_1/sep/bn needs backward computation.
I1103 13:56:20.871213 2944 net.cpp:226] conv4_1/sep needs backward computation.
I1103 13:56:20.871213 2944 net.cpp:226] relu4_1/dw needs backward computation.
I1103 13:56:20.871213 2944 net.cpp:226] conv4_1/dw/scale needs backward computation.
I1103 13:56:20.871213 2944 net.cpp:226] conv4_1/dw/bn needs backward computation.
I1103 13:56:20.871213 2944 net.cpp:226] conv4_1/dw needs backward computation.
I1103 13:56:20.871213 2944*** Check failure stack trace: ***

But，i used the Alexnet to train my data everything is OK。So，can you give me a hand？