Procedure
How can I explode only arcs for a specific layername within DXF blocks?
Answer:
If the arcs are to be exploded in all the blocks for layername "pipelines," use the following syntax:
Enter layer names and options (type END or $REST when done)
Enter the 1st layer and options : pipelines blocks arcs
Enter the 2nd layer and options : end
Do you wish to use the above layers and options (Y/N)? y