Dear colleagues,

I am currently designing a mask set in AutoCAD R14, and have encountered
some difficulties. There are a number of redundant layers that I now need to
delete. However, when I attempt to delete these redundant layers the
following message is displayed in AutoCAD:

"The following layers cannot be deleted:
{1} Layer 0 and Defpoint layers.
{2} The current layer.
{3} X-ref dependent layers
{4} Layers containing objects."

This message does not solve the problem, as:
{1} The layers that I need to delete are separate from the defpoint or 0
layers, (statement {1} may be discounted.)
{2} The redundant layers cannot be deleted whether or not they are selected
as current, (statement {2} may be discounted.)
{3} There are no x-refs in the anywhere in the file [active or redundant
layer], (statement {3} may be discounted)
{4} There are no objects present in the redundant layers, (statement {4} may
be discounted.)

 I am at a loss as to understand the nature of this problem. I am writing to
see if there is anyone in our research community with experience of AutoCAD
who might recognise this problem and can perhaps offer a solution?


Many Thanks


Richard Haigh