UPDATE: *.12daz files are just zip files. Rename it to <YOURFILE>.zip and extract the *.12da file within
If anyone has been trying to use the 12DA import extension for Civil 3D and it isn’t working. Read on!
I have been having problems importing latest 12DA files. It doesn’t import anything for some reason.
A simple change to the 12DA files encoding fixes the error. Get NOTEPAD ++ Download Here
Old 12DA files encoded with “UTF-8 without BOM” will work. However new ones encoded with “UCS-2 Little Endian” won’t convert them and save as shown below. All working again!
Extra Bonus (courtesy lem_1020)
“Saved this way it actually allows you to open new version 12da projects in old 12d model versions also.”
Kapanther
Original Post Here
