WARNING!!! Inaccurate drawing details would be generated because your units of resolution in both models are not identical.
This error is caused by using drawing seed for the section sheet than was used for the 3d model. If the 3D model was created using an imperial model seed you should chose an imperial seed for the drawing when creating a section.
Another possible reason for getting this message is if the Units of Resolution in the Default model and the Seed file for Sheet model is different in design File Settings. See the example snaps below:
By default the Default 3D model comes with the resolution of 10 per Distance Millimeter and it is recommended not to change this.