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Drawing Recovery Techniques
If you suspect the error occurs because the drawing is corrupt, review each drawing recovery technique to see which one would be appropriate to use.
Before Recovering a Drawing
It is strongly recommended you perform the following steps before recovering a corrupt drawing:
* Make a backup copy or copies of the drawing onto reliable storage media. For example, if you suspect that your hard disk drive contains bad sectors, either copy your files to another hard disk drive, a network drive, a floppy disk, or to tape. It is best to perform recovery operations on a copy of the file because there are several methods of recovery, and each method alters the file in a different way. Also, it is best to use a copy of the original drawing file as recovery processes may alter a damaged drawing yet still not sufficiently recover it so that AutoCAD can open it. If you retain a copy of the original damaged file, you can then use another recovery process on the original file.
* Identify and make backup copies of BAK files associated with the damaged drawing. If you open and save a damaged file without fully recovering it, you may overwrite a good BAK file with a corrupt BAK file.
AutoCAD RECOVER Command
To use the RECOVER command on a damaged drawing, launch AutoCAD and open a new drawing from scratch. Use the OPEN command to open the drawing. If AutoCAD detects that it is corrupt, it displays a message indicating the file is damaged. AutoCAD then prompts you to use the RECOVER command to open the drawing and displays a message asking you to enter YES to proceed. If you proceed, AutoCAD then scans through the drawing database to detect and fix errors.
If the RECOVER feature cannot repair the drawing, AutoCAD displays one of several messages to indicate that the file cannot be recovered. If the drawing is severely corrupt, the recovery process may stop responding or AutoCAD may shut down. If this happens, you need to reboot the computer and try a different recovery method.
If the drawing can be opened with the RECOVER command, you should next use the AUDIT command. It is possible to have a drawing that contains "nested" damage that cannot be fixed by the RECOVER process on the first pass. In this situation, use the AUDIT process once or several times to fix this type of damage.
Using the INSERT Command to Recover Drawings
It is sometimes possible to use the INSERT command to recover a damaged drawing. If the RECOVER command cannot successfully open a drawing, you may be able to insert the drawing into another drawing as if it were an external block. Use the following procedure:
1. Start AutoCAD and open a new drawing from scratch.
2. Enter DDINSERT on the command line command, or select Insert > Block from the Draw menu to display the Insert dialog box.
3. Choose the File button, and select the damaged drawing from the Select Drawing File dialog box.
4. Remove the check from the "Specify Parameters Onscreen" checkbox, and place a check in the "Explode" checkbox.
5. Choose OK in the INSERT dialog box.
AutoCAD attempts to insert and explode the damaged drawing. If the process succeeds, run the AUDIT command as described in the preceding section, AutoCAD RECOVER Command.
Save as AutoCAD Release 13 Format and Reload
If the drawing can be opened, but it appears to be corrupt, or if an error occurs after working on the drawing for a short time, you can try saving the drawing as an R13 drawing, and then reopen it in AutoCAD R14. This method is preferred by some customers to inserting the drawing into a new "start from scratch" drawing, because it retains many of their environment settings.
Drawing Recovery using DXFOUT and DXFIN
AutoCAD contains a translator for creating Drawing Exchange Format (DXF(tm)) files from DWG files. It is possible to use the DXF conversion process to repair damaged drawings. Keep in mind that the DXF translator was not designed for recovering drawings, and therefore will not work on drawings that contain a lot of damaged data. Also, the error and warning messages that appear during the DXF translation are not meant to provide detailed information about the status of drawing damage or recovery.
To use the DXF translator to recover a file, you need to open the drawing in AutoCAD, and then immediately cancel the first automatic regeneration process that occurs when the drawing is opened. If you can perform this step, you can use the DXF translator to create a DXF file. You can then either re-translate the DXF file into a DWG file, or repair the .DXF file manually by editing it in an ASCII text editor, such as Notepad.
1. Start AutoCAD.
2. From the File menu, select Open, or enter OPEN on the command line.
3. Select the damaged drawing from the File dialog box to open it.
4. Choose OK in the Select file dialog box to open the drawing, then immediately press the ESC key to cancel the current command.
Note: You can use the IGES translator in the same way to recover a drawing.
This process should cancel the first regeneration of the drawing. If the drawing can be opened, the AutoCAD command prompt will appear. (You may want to practice this process with an undamaged drawing in order to obtain a sense of how do this.)
1. Enter DXFOUT on the command line. You will be prompted to enter a name for the DXF file and the level of accuracy for the file translation. The translation process begins when the level of accuracy is entered. Refer to the AutoCAD User's Guide on File Management and Formats, for more information about DXF files and translation choices.
2. After the DXF file is created, reimport the file into AutoCAD using the DXFIN command. To import the file into AutoCAD, open a new drawing (no prototype), and enter DXFIN on the command line, then select the DXF file you created. The file is then translated again into an AutoCAD DWG file.
If the DXFIN process fails, you can view and edit the DXF file in an ASCII text editor. A DXF file is a complete translation of the drawing as ASCII text. Refer to the AutoCAD Customization Guide for a description of the contents and structure of a .DXF file.
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น่าจะแก้ปัญหาได้ ใครสะดวก รบกวนแปลทิ้งไว้หน่อยครับ ผมยังไม่ว่างเท่าไรครับ
Drawing Recovery Techniques
If you suspect the error occurs because the drawing is corrupt, review each drawing recovery technique to see which one would be appropriate to use.
Before Recovering a Drawing
It is strongly recommended you perform the following steps before recovering a corrupt drawing:
* Make a backup copy or copies of the drawing onto reliable storage media. For example, if you suspect that your hard disk drive contains bad sectors, either copy your files to another hard disk drive, a network drive, a floppy disk, or to tape. It is best to perform recovery operations on a copy of the file because there are several methods of recovery, and each method alters the file in a different way. Also, it is best to use a copy of the original drawing file as recovery processes may alter a damaged drawing yet still not sufficiently recover it so that AutoCAD can open it. If you retain a copy of the original damaged file, you can then use another recovery process on the original file.
* Identify and make backup copies of BAK files associated with the damaged drawing. If you open and save a damaged file without fully recovering it, you may overwrite a good BAK file with a corrupt BAK file.
AutoCAD RECOVER Command
To use the RECOVER command on a damaged drawing, launch AutoCAD and open a new drawing from scratch. Use the OPEN command to open the drawing. If AutoCAD detects that it is corrupt, it displays a message indicating the file is damaged. AutoCAD then prompts you to use the RECOVER command to open the drawing and displays a message asking you to enter YES to proceed. If you proceed, AutoCAD then scans through the drawing database to detect and fix errors.
If the RECOVER feature cannot repair the drawing, AutoCAD displays one of several messages to indicate that the file cannot be recovered. If the drawing is severely corrupt, the recovery process may stop responding or AutoCAD may shut down. If this happens, you need to reboot the computer and try a different recovery method.
If the drawing can be opened with the RECOVER command, you should next use the AUDIT command. It is possible to have a drawing that contains "nested" damage that cannot be fixed by the RECOVER process on the first pass. In this situation, use the AUDIT process once or several times to fix this type of damage.
Using the INSERT Command to Recover Drawings
It is sometimes possible to use the INSERT command to recover a damaged drawing. If the RECOVER command cannot successfully open a drawing, you may be able to insert the drawing into another drawing as if it were an external block. Use the following procedure:
1. Start AutoCAD and open a new drawing from scratch.
2. Enter DDINSERT on the command line command, or select Insert > Block from the Draw menu to display the Insert dialog box.
3. Choose the File button, and select the damaged drawing from the Select Drawing File dialog box.
4. Remove the check from the "Specify Parameters Onscreen" checkbox, and place a check in the "Explode" checkbox.
5. Choose OK in the INSERT dialog box.
AutoCAD attempts to insert and explode the damaged drawing. If the process succeeds, run the AUDIT command as described in the preceding section, AutoCAD RECOVER Command.
Save as AutoCAD Release 13 Format and Reload
If the drawing can be opened, but it appears to be corrupt, or if an error occurs after working on the drawing for a short time, you can try saving the drawing as an R13 drawing, and then reopen it in AutoCAD R14. This method is preferred by some customers to inserting the drawing into a new "start from scratch" drawing, because it retains many of their environment settings.
Drawing Recovery using DXFOUT and DXFIN
AutoCAD contains a translator for creating Drawing Exchange Format (DXF(tm)) files from DWG files. It is possible to use the DXF conversion process to repair damaged drawings. Keep in mind that the DXF translator was not designed for recovering drawings, and therefore will not work on drawings that contain a lot of damaged data. Also, the error and warning messages that appear during the DXF translation are not meant to provide detailed information about the status of drawing damage or recovery.
To use the DXF translator to recover a file, you need to open the drawing in AutoCAD, and then immediately cancel the first automatic regeneration process that occurs when the drawing is opened. If you can perform this step, you can use the DXF translator to create a DXF file. You can then either re-translate the DXF file into a DWG file, or repair the .DXF file manually by editing it in an ASCII text editor, such as Notepad.
1. Start AutoCAD.
2. From the File menu, select Open, or enter OPEN on the command line.
3. Select the damaged drawing from the File dialog box to open it.
4. Choose OK in the Select file dialog box to open the drawing, then immediately press the ESC key to cancel the current command.
Note: You can use the IGES translator in the same way to recover a drawing.
This process should cancel the first regeneration of the drawing. If the drawing can be opened, the AutoCAD command prompt will appear. (You may want to practice this process with an undamaged drawing in order to obtain a sense of how do this.)
1. Enter DXFOUT on the command line. You will be prompted to enter a name for the DXF file and the level of accuracy for the file translation. The translation process begins when the level of accuracy is entered. Refer to the AutoCAD User's Guide on File Management and Formats, for more information about DXF files and translation choices.
2. After the DXF file is created, reimport the file into AutoCAD using the DXFIN command. To import the file into AutoCAD, open a new drawing (no prototype), and enter DXFIN on the command line, then select the DXF file you created. The file is then translated again into an AutoCAD DWG file.
If the DXFIN process fails, you can view and edit the DXF file in an ASCII text editor. A DXF file is a complete translation of the drawing as ASCII text. Refer to the AutoCAD Customization Guide for a description of the contents and structure of a .DXF file.
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