Nnvm error while building mxnet

while installing python setup of incubator-mxnet we are getting following error:
terminate called after throwing an instance of

what(): [11:22:26] 3rdparty/tvm/nnvm/include/nnvm/op.h:461: Check failed: p.second != plevel Attribute FCompute of operator signsgd_update is already registered with same plevel=10

We are able to generate libmxnet.so .
and trying to install mxnet(sudo python setup.py install)

As per the /tvm/nnvm/include/nnvm/op.h code in this file we can register operator with one plevel value only once.

Can anyone help me on this…

Hi @mn265,
Did you modify MXNet or add any operators before building it ?