AutoCAD Map 3D Developer

[#1]

I can add a single feature to the sdo/shp file. But when I add annother feature(eg a point ) shows the error:

Failed to create layer source feature cache.
Failed to create feature definition in GWS cache.
Item fsd___SHP_1$Default$point_clip$L is already in this named collection.

This happens with both C# and vb.net.

How can I add multiple features and commit the same.

Thanks.

[#2]

Could you please paste the core code snippet so that we can take a look at the code? 

[#3]

It may be because SHP/SDO do not allow multiple edits. Hence left that part and working with object data attributes for multiple edits.

Can I display the any attribute value as a label on the drawing for easy visual editing?

http://forums.autodesk.com/t5/NET/display-any-attribute-object-data-on-the-dwg-file/td-p/3634332

Please suggest your view whether it is possible or not.

Thanks.