solidworks part crash

[Ilyluna]

Good morning to all,
I am a neophyte of solidworks, I use it for a few months and only now I'm finding a problem that I can't solve.
I'm working on a part file. I created a part formed by many bodies, at the moment they are more than 40. this because I had to create a complex set of very small pieces, which had been started with this approach by another person and I went on. the idea was to draw using consecutive relationships and functions, and then save the part as a step and then as a set of parts once the desired result.
Now, my file has filled more than expected, I have reached about 900 functions and wonder if it is not too heavy because this happens to me:
at the last save the file was perfect, without any alert; now if I open it and go to make any changes, whether it be adding a sketch or changing a function (even the last of the tree), the file crashes completely: the tree fills with functions in red as if I had erased something at first and had lost all subsequent references.
This prevents me from working on it, and the only thing I can do is shut down without saving to return to the last save without errors.
Has anyone ever happened? Do you have any idea how I can solve this?
Thank you so much!

ps: I attach photos of the last part of the pre and post editing tree, a simple suspension of the last sketch.

 

[MassiVonWeizen]

the idea was to draw using consecutive relationships and functions, and then save the part as a step and then as a set of parts once the desired result.

If I didn't get it wrong, you'd like to, or you should, create a multibody file that simulates a set and then turn it into a neutral file.
already the passage for a neutral file makes no sense. you can turn a part file together without intermediate steps.
but the main problem is that you are doing a set as a multibody and then transform it.
because they hide all those errors it is impossible to know without having the file underhand.
900 functions are of course many, 40 bodies are not many, and without carefulness and targeted settings the program has difficulty updating.
considering that a multibody part represents 90% of the cases a particular that logistically is considered a unique object (which is welded, glued or combined with drawing dots) and a set represents the union of more objects through removable systems (vites, thorns, force of gravity), if your part is to be considered in the second category has been handled incorrectly.
to settle your current situation you will probably lose more time than to remake the project from the top in the correct way

 

[Ilyluna]

thanks for the quick answer!
Alas, that's what I imagined.
yes, the final object should be a set held by screws etc; Unfortunately as I said I took a job started by others with this approach and I carried it forward, until last night it gave me no problem.
So probably the problem is that the tree is too heavy and when I go to make a change it doesn't make it to rebuild it properly, does it?
thinking about redesigning each body as part of the moment is impossible for reasons of time obviously, so I ask you: how can I save directly as a whole without passing through the step? At least I would keep the "good pieces" made until now...

 

[MassiVonWeizen]

function saves bodies>creates together.
if you can't do it with the function a barbaric way and with water to the throat is to save n° copies of the part file (renamed obviously) and with the function deletes body keep in each file only what interests.

write in the profile the version of solid, thanks

 

[Ilyluna]

Thank you very much, you were very helpful. at least with the saves I can recover what I have of good and that does not need any other changes!