3D forward modeling of NSEM

Electromagnetics
1

Hello
Thank you so much for the opportunity to use the SimPEG and ask questions!

In the plot_fwd_nsem_MTTipper3D example,the program does not work.The error code is as follows：

# # # # # # # # # # # # # # # # #

Setup the problem object

problem = NSEM.Simulation3DPrimarySecondary(
    M,
    survey=survey,
    solver=Solver,
    sigma=sig,
    sigmaPrimary=sigBG,
    forward_only=True,)
# Calculate the data
data = NSEM.Data(survey=survey, dobs=problem.dpred())
data.relative_error = 0.1
data.noise_floor = 0.0

# # # # # # # # # # # # # # # # #

dobs=problem.dpred()This line of code does not run, does not report an error, and does not output any results。
How can I get the right data?
Could you please help me?
Thank you in advance!