This is a support issue, please contact your local customer support organisation for assistance, they will be able to provide a faster response than this forum.
thanks for reply
well, I asked them before but my fae said they haven't encountered this issue yet.
that's why I'm here
Have you tried contacting support at Actel. Libero certainly was based a few ago on the same underlying schematic editor as DxDesigner.
It may well be a conflict caused by the your recent Libero installation.
I did care this option not checked during installation.
I think there must be some common files conficting each other.
I tried resintall EE, but it doesn't work, either.