When to Use NCOPY:

• Preserving Block Structure: If you have a block with nested objects (blocks within blocks) and you want to duplicate the block while maintaining its structure, NCOPY is useful. It avoids the need to explode the block, keeping the original block definition intact.
• Efficient Editing: When you only need to replicate a specific instance of a nested block within a larger block, NCOPY allows you to do so without disrupting the overall block structure.
• Avoiding Unwanted Changes: If you want to create a copy of a block without affecting the original or other instances of the same block, NCOPY is a safer alternative to copying and pasting or using the COPY command.
• Nested Attributes: When dealing with blocks that contain attributes or nested blocks with unique properties, NCOPY ensures that the copied block maintains these nested elements.
• Copying from External References (Xrefs): When you need to borrow specific elements from an xref without fully attaching or exploding it, NCOPY allows you to selectively copy objects without modifying the original xref.
• Copying from Blocks: Similarly, you can use NCOPY to extract desired objects from a block without having to explode the entire block, preserving its integrity and structure.