To replace an existing block in your DWG drawing with a new block from another DWG drawing that has the same block name, you can follow these steps:
1. Open both the source drawing (the one with the new block) and the target drawing (the one where you want to replace the existing block) in AutoCAD.
2. In the target drawing, use the "PURGE" command to remove any unused block definitions. This step ensures that the block names won't conflict during the replacement process.
3. In the source drawing, select the new block that you want to use as a replacement.
4. Copy the selected block to the clipboard using the "COPY" command or by pressing "Ctrl+C".
5. Switch to the target drawing where you want to replace the block.
6. Use the "PASTE" command or press "Ctrl+V" to paste the copied block into the target drawing. AutoCAD will prompt you to specify the insertion point for the new block.
7. Specify the insertion point for the new block in the target drawing. You can choose the same insertion point as the original block or a different location if desired.
8. AutoCAD will then ask you if you want to redefine the block. Type "Y" and press Enter to confirm that you want to redefine the block with the new definition.
9. The new block from the source drawing will replace the existing block in the target drawing, using the same block name. Any instances of the old block in the drawing will be updated to the new block definition.
10. Save the modified target drawing to preserve the changes.
By following these steps, you should be able to replace an existing block in your DWG drawing with a new block from another DWG drawing that has the same block name.
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