BBCY,<num>,<points>,<yield>,<Y1>, … <Yn>

This Command along with BBCX can be used define a sparse backbone curve in the User Interface, large list of coordinates on a single line have caused problems when loading a Pre file. It is recommended that users define a backbone curve with either the BBCI and BBCP commands or load a curve stored in a file with the BBC.

• num - number of the backbone curve
• points - number of points in the curve
• yield - yield point for the curve
• <Y1> … <Yn> - Y component of the points on the curve