add instance without symbol view

Hello !
I have a problem when adding instance in Virtuoso schematic. The problem follows below
.
So I have to type the view symbol manually,it's so inconvenient. Please help me with the problem!

Hi,

Please make sure that your library path is defined properly, cell name presence in that library and symbol views.
Browse all three things and Then you try with the adding instance.

Thanks,
Basu

Hi,
First of all, thank you.
I can ensure all three things.
When I add NMOS transistor n18e2r,some warnings appear:
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "symbol.oa".The file is in library "smic18ee" in cell "n18e2r" in view "auCdl". You must run an OA executable to use that library file.
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "symbol.oa".The file is in library "smic18ee" in cell "n18e2r" in view "symbol". You must run an OA executable to use that library file.
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "symbol.oa".The file is in library "smic18ee" in cell "n18e2r" in view "ams". You must run an OA executable to use that library file.
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "symbol.oa".The file is in library "smic18ee" in cell "n18e2r" in view "spectre". You must run an OA executable to use that library file.
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "layout.oa".The file is in library "smic18ee" in cell "n18e2r" in view "ivpcell". You must run an OA executable to use that library file.
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "symbol.oa".The file is in library "smic18ee" in cell "n18e2r" in view "auLvs". You must run an OA executable to use that library file.
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "symbol.oa".The file is in library "smic18ee" in cell "n18e2r" in view "UltraSim". You must run an OA executable to use that library file.
*warning* ddMapGetFileViewType: You are trying to run a CDB executable on an OA library file "layout.oa".The file is in library "smic18ee" in cell "n18e2r" in view "layout". You must run an OA executable to use that library file.

I can't understand these warnings.

Hi,

You are trying to instance CDB database cell files in OA database.
Please use OA database cell files.

Thanks,
Basu