I‘m back to create mods!
@CanadianAircraftBuilder Now I solve the problem and update the mod,try to work it again
@CanadianAircraftBuilder thank you for your advise,I will solve it soon
@CanadianAircraftBuilder I found the problem just now,when the terrain under or on the top of the construction area,the blueprints will disappear,now just one idea to solve this problem----remove the terrain which under the construction area
@CanadianAircraftBuilder Now I solve the problem and update the mod,try to work it again
@CanadianAircraftBuilder thank you for your advise,I will solve it soon
@CanadianAircraftBuilder I found the problem just now,when the terrain under or on the top of the construction area,the blueprints will disappear,now just one idea to solve this problem----remove the terrain which under the construction area