Try start the CellEditor70.exe by command line.
<example command>
D:\MentorGraphics\7.9.5EE\SDD_HOME\lm\win32\bin\CellEditor70.exe D:\DxD_Exp\Library.lmc -Caller LibMan -BU 1NM -Partition smd_conn -Cell cn00461
Satoru
Try start the CellEditor70.exe by command line.
<example command>
D:\MentorGraphics\7.9.5EE\SDD_HOME\lm\win32\bin\CellEditor70.exe D:\DxD_Exp\Library.lmc -Caller LibMan -BU 1NM -Partition smd_conn -Cell cn00461
Satoru