Problem

When importing a DWG, some levels disappear and its elements are placed on the "Default" level

Solution

This happens when the level names include characters that are not allowed.

The characters that are not permitted in the level names include:

Ampersand ( & )
Asterisk ( * )
Vertical bar ( | )
Backslash ( \ )
Forward slash ( / )
Period ( . )
Less than ( < )
Greater than ( > )
Single quotation mark ( ' )
Double quotation mark ( " )
Question mark ( ? )
Comma ( , )
Equal ( = )

To avoid the levels being deleted during import, do the following:

• Go to File > Settings > User > Preferences > References > "Copy level" and choose the option "Always"

That way, when importing or merging a DWG into DGN, the offending characters will be replaced with an underscore and the levels will stay in the file.

See Also

Levels And Level Libraries