Hello!I have large dwg file with many xref in it, the problem is that layout page consists of many (27) viewports and some of them won't show model drawings (and i can't access model through them) , after regenerating nothing changes. Drawing plot's with all viewports visible, in plot preview everything is fine. Where is the problem ?? 

You need to adjust your MAXACTVP variable. This sets the maximum number of viewports that can be active at one time in a layout.
Cad642010-11-16 21:09:46

THANK YOU !!! YOU JUST SAVED THE DAY !