If such a situation is encountered, the following operations are required:

1. First, check the size of the water jet. For an ordinary water jet CAD, the file size is generally not more than 5M. If your CAD is over 10M, there is usually a problem with this water jet. Copy this parquet separately, then create a new file, paste it, and save it;

2. Open the CAD. Do not check the lines first; double-click the middle button first to see what else is inside the water jet besides this parquet, such as:

Create a new CAD, copy it out separately, save it, and upload it.

3. If there is only one pattern in the entire CAD, but it still does not display or has missing lines when imported. It is necessary to check the construction type of this water jet,

Note: 3.0 water jets do not support regions! Also, 3.0 water jets do not support blocks!

It needs to be exploded by pressing X and re-uploaded.