I'm kind of new to this so please be patient with me.

I have setup version11.2 and I'm trying to insert blocks using the -insertblock "file name" or -i 'file name" and everthing works fine, but the filename requires the .dwg extension in order to work. For example, typing -insertblock door gives an error message "Invalid File" but -insertblock door.dwg works fine. Since all of our blocks are in dwg is ther a way to manipulate the command string to include the .dwg extension to the file name? 

Perhaps there's an even easier solution.