There are some parts whome i have mirrored to create oposite hand versions and do pattern.
I can see then in assembly but they are not shown in assembly tree manager.
see below pics. for same.
Any one have idea what to do now...
To have them show in the tree, you'd have to dissolve the pattern.
Dissolving but still there is no part shows in tree manager.
Now after disolving when i select disolved part my solidworks crashed...
I see from your screenshot that there seems to be a problem with all of your patterns and mirrors, since they don't have the plus sign in front of them to allow you to expand the feature to show the parts. Normally that happens if the part being patterned (or mirrored, etc.) has been deleted, but it doesn't sound like that's the case here. I seem to remember running into this in the past. Try a Ctrl+Q rebuild. If that doesn't work, click on one of the features and choose the edit icon. Make sure that all the selections still show (pattern direction, parts to pattern, etc.). If they do, go ahead and click on the green check mark to close the feature and see if that helps.
I agree with Glen,
when creating mirrors/patterns try and use references native to the assembly, such as planes or axis, rather than features from the parts. This will minimise errors in these assembly features when the geometry of the parts are altered.
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