Import a Spline

MG.

Hi all, I want to plot the wall_data along the wall of the model. However, the model is not a simple geometry, it has different curves. I generated a curve using igs file, and imported to my model, then converted it to spline. But, when I import this curve, the coordinate of the entire model changed. I am sure the original model and the igs spline shared the same coordinate system originally. Does any one have any recommendations or suggestions in importing a spline to the model ? Thank You in Advance.

-MG.