Illustrator Lagging with Many small objects

Hi
I am running Illustrator CS6, and I have found that Illustrator lags a lot when I have multiple objects that are very small. For example, for my school project I am creating four seasons, and I have multiple leaves on the trees, but since they are very small and I have multiple copies it slows Illustrator down siginificantly. What I am trying to figure out is if there is a way to reduce the quality of the artwork, so that It can run fast when I need it to. Below is a link to download the file, so you can see what I mean. Right now it lags when you zoom In/Out or if you try and move the object. Also, my computer Specs are listed beloIn
Intel I7 2700K (3.5GHz Quad Core)
8GB DDR3 PC3-1600
Radeon HD5770 (1GB Ram)
For the most part, it loads files very quick but after making multiple copies of files its starts to really lag a lot. Let me know if anyone has any suggestions. The download link is below
http://www.fileswap.com/dl/w00D4kwsVM/W5A1_-_Fall.ai.html
Thanks,
Simon

I took that file and opened it in an older version of Illustrator, that is, my inspections may not be relevant.
Your leaves are all identical – as far as I can see. You may want to use them as symbol instances instead of common path objects.
Also, if there are performance issues (I don't face them with that file), you could turn off Anti-aliasing in the general preferences.

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Please advise for further.
Thanks in advance,
Nish

950358 wrote:
Thanks Husain,
I have run utlrp.sql but still there 777 invalid objects available in my system.
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Thanks,
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https://forums.oracle.com/forums/search.jspa?threadID=&q=Invalid+AND+Objects+AND+12.1.3&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
https://forums.oracle.com/forums/search.jspa?threadID=&q=Invalid+AND+Objects+AND+R12&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
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[Moved by moderator to appropriate forum]

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