Compress file

If the hatch is only defined in that file and not used and you compressed the file, with the option checked to delete unused shared cells, then it's gone, no undo possible as far as I know.

If your hatch is obtained through cutting a part and that part definition, with hatch properties is still available in your dataset, then you should see the hatch upon reopening the file at the very least.

Did you modify some parts to no longer be cut, or did you change scales or units?

If somebody gave you a file that had the hatch (pattern?) definitions and you compressed that file (shared), there's little you can do except ask for that file again.

Please provide some more detail and steps to reproduce.

You compressed the file, ok I gather that much from your post, but how did you get the hatch in the first place?

this hatch came from library "part" symbology

Hi, we do not have enough information to be able to answer this question. Other than the suggestions Koert has made above we would not expect compressing a file to remove hatching.

What is the display style selected for the cut?

How did you create the cut?

Did you rename the part in the parts library, but the element was placed with the old part name and now that name can't be found anymore in the library perhaps?

It's very unlikely that you go from OK to not OK just by compressing the file. You must have done something else that you're forgetting to mention.

As Koert suggested, compressing a file primarily removes unused data so the chances of a hatch being removed as a result of that (and no other factors) does seem unlikely.  

but which option of compressed cause the hatach deleted

Probably the ones that remove cached Dynamic View information, if e.g. a section was created with one dataset and then opened in another dataset.

communities.bentley.com/.../8252.aspx

Others like Unused Named Shared Cells could also remove unused pattern cells from a file if you used it on a file in your cell search path, but you'll have to be more specific as to what hatch was removed where.

Check only the compress options you want. If you don't know what those options do it's probably wiser to not use them without backing up that file first.

Probably the ones that remove cached Dynamic View information, if e.g. a section was created with one dataset and then opened in another dataset.

communities.bentley.com/.../8252.aspx

Others like Unused Named Shared Cells could also remove unused pattern cells from a file if you used it on a file in your cell search path, but you'll have to be more specific as to what hatch was removed where.

Check only the compress options you want. If you don't know what those options do it's probably wiser to not use them without backing up that file first.