To convert drawings from one application format to another, it is important to know the drawing parameters the application uses.
To find out exactly which combination of layers, linetypes, lineweight, and colors an application uses, use AMANALYSEDWG to analyze the current drawing.
The analysis routine asks for the file name of the analysis (ALZ) file. The analysis file contains a list of layer-linetype-color-lineweight combinations that exist in the drawing. You can use the ALZ file to create a conversion control file (CCF) file. The following list shows an example of the contents of an ALZ file:
0:BYLAYER:BYLAYER:BYLAYER
CONTOUR:BYLAYER:5:BYLAYER
CONTOUR:BYLAYER:BYLAYER:BYLAYER
EDGES:BYLAYER:250:BYLAYER
EDGES:BYLAYER:BYLAYER:BYLAYER
EDGES:DASHDOT:250:BYLAYER
EDGES:DASHDOT:250:BYLAYER
The preceding list indicates, for example, that the drawing contains entities on the contour layer, with color 5 and with the color BYLAYER, and entities on the edges layer.
As you can see, converting this file to a CCF file is easy. Add the =>-sign and the destination layer-linetype-color-lineweight combination desired, add the section entry (for example, [General]), and add any comments.