http://www.zwsoft.com/forum/viewthread.php?tid=1621 Dear Valve, Actually it's a BUG, but we have already fixed it. And we made a temporary patch for users to solve this problem. The download link of the patch: <a href="http://download.zwcad.com/en/Special/20100730/ZWCAD2010EngWeb_0730.msi" target="_blank">http://download.zwcad.com/en/Special/20100730/ZWCAD2010EngWeb_0730.msi</A> It's a full installation version, so you need to uninstall your current ZWCAD first. <strong><FONT color=#ff0000>Remember to return your license first.</FONT></strong> This patch is only a beta version that not officially released, so maybe not so stable enough. If you meet any problem in using it, feel free to ask here or send email to: <a href="mailto:tech@zwcad.com" target="_blank">tech@zwcad.com</A> Thanks in advance and have a nice day! Valve 2010-08-09 09:20:20 http://www.zwsoft.com/forum/viewthread.php?tid=1621&pid=12783 <P style="MARGIN: 0cm 0cm 0pt" =Msonormal><SPAN style="FONT-FAMILY: Arial"><FONT size=3>Dear sirs,<?:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></SPAN> <P style="MARGIN: 0cm 0cm 0pt" =Msonormal><SPAN style="FONT-FAMILY: Arial"><FONT size=3>When I use command zoom+ some lines of block disappear, in the meantime the command zoom- is OK. (I use Zwcad 2010 Version 1010.06.30, Win7 64 bit, Ati Radeon 4550). Can you suggest<SPAN style="COLOR: black"> any solution?</SPAN> Command zoom+ works normaly by the program ?DWG TrueView 2011?.<o:p></o:p></FONT></SPAN> Valve 2010-08-08 01:14:40