objects that "spark" in 3d modeling

[elieli]

Good evening! I would like to ask you if you have ever had problems with objects that "split" in space 3d. I'll tell you what happened to me. I designed pieces in the two-dimensional space, then I rotated the view in the three-dimensional space to extrude them, and only some objects disappeared. I managed to keep them, but it stuck my zoom or sometimes it disappeared.
I want to point out that project in autocad every day, and the procedure I used is the same as many times.

 

[doking]

you drew them along the z axis on different values, the objects did not disappear, they just went out of field

 

[elieli]

you drew them along the z axis on different values, the objects did not disappear, they just went out of field

thanks doking. so to see what I should do? twice clicking the mouse wheel does not appear to me anyway:frown:

 

[doking]

Maybe if you place the file I could be more useful!
the fact that if you click the wheel and does not return visible it denies my thesis