Why is this happening

[iraesoft]

[kacper.suchomski]

?

[admaiora]

"A problem well-defined is a problem half-solved"

[tobias]

Let me guess: the assembly is totally mixed up. Probably because of constraints, such as to many angel constraints.

[CGBenner]

@iraesoft 

Hello and welcome.  Can you please provide a more detailed description of the issue that you are trying to solve?  Is there any chance that you could provide the files for people here to look at?

[Frederick_Law]

"A picture worth a thousand words."

We still need a few words to say what we are looking at.

I see:

A bunch of gray parts with some yellow parts on white background.

"Why is this happened?"

What is "this"?

Yellow color?  White background? Grey?  The parts?

Nothing happen when we look at the picture.

[The_Angry_Elf]

A shot in the dark here since there's sooooo little to go on, but as already stated, looks like you have some unconstrained or poorly constrained components.

Explain what led to this, what was it like before, what errors do you see, etc.

[johnsonshiue]

Hi! This is probably a shaded drawing view having reference components. Edit the drawing view and bump up the "margin" value to 1000.

Many thanks!