Give copies to your friends. The file set includes a Shortcut file. To install this, open the DEMO folder. Click on this and the Software will start. If these are followed, they will keep you from getting error messages.
Crossings usually occur at the hull ends, at the stem or transom.
These must not go beyond the first station at the bow, or the second from last at the stern. If you want longer bow or stern offsets, you must use negative offsets. SEE the PROA35.DAT file for an example. If you press a Right or left arrow key and try again, this is usually eliminated. It is caused by a pixel count fault.