cannoscale issue

Good day,

This problem is occuring with one drawing only.

Whenever I use Cannoscale to adjust the scaling of how the drawing is to be viewed in the viewport, it takes a while to adjust.

Also, Block Editor takes a while to open as well, and even longer to close.

I ran Purge and Recover....no such luck.

Assistance please?

What is contained in the problem drawing? What size? Computer specifications? Did you try -PURGE?

yes i did. Didn't help.

(What is unusual is that every once in a while alot of unknown blocks show up in the purge list)

Found this happens a lot if you've got many annotative hatches.

Really? Never knew that.

But I don't have any annotative hatches.

The issue is that every time the CannoScale is changed (BEdit/BClose, change Tab, etc.) all annotative objects need to be redrawn at the new scale. Most work fine by having their versions pre-calculated (such as blocks), but hatches need a total re-calculation. So if there are many of them this could take some time.

As for why this could happen without hatches ... All I can think of is some form of corruption happening. Try the usual cleaning methods (purge / audit / wblock / copy-n-paste / etc.) perhaps that gets rid of some of these issues.

Another thing is xreffed scales. I generally prefer to keep all the scales I use throughout my project in each and every DWG in the project. This is because of how the idiots who programmed ACad's anno scales made it work with xrefs. If I only keep the scales in use in the DWG it ALWAYS ends up making those XRef_*** scales, the only way to avoid them is to have the relevant scales already inside the current DWG (even if that DWG does not use them). And no, even in 2013 these are only hidden from the list - they still cause slow downs.