How to recover lost or corrupted AutoCAD DWG files in India
Short answer: AutoCAD .dwg file recovery depends on whether the loss was due to application crash, accidental deletion, or hardware failure. Crash recovery uses AutoCAD’s built-in autosave (.sv$ files) and .BAK one-version backups. Accidental deletion uses standard file recovery tools (Recuva, PhotoRec) which recognise DWG file headers. Corrupted files that open partially can be repaired using AutoCAD’s RECOVER, AUDIT, and RECOVERALL commands before resorting to third-party tools.
AutoCAD DWG recovery — the paths in order
Step 1: Autosave and .BAK recovery after a crash
If AutoCAD crashed without saving, look for autosave files first. The default autosave location is C:\Users\{username}\AppData\Local\Temp\ — search for files ending in .sv$. Rename the .sv$ file to .dwg and open it in AutoCAD to recover the last autosave. AutoCAD also creates a .BAK file (same name and location as the original .dwg) every time you save — it contains the previous version. If the current .dwg is corrupted, rename the .bak file to .dwg to access one version back. For older AutoCAD versions (2018 and below), autosave location may differ — check AutoCAD Options → Files → Automatic Save File Location.
Step 2: Repair a corrupted .dwg with AutoCAD’s built-in tools
If a .dwg opens with errors, or partially opens with missing objects, use AutoCAD’s native repair commands before third-party tools. Type RECOVER in the command bar → select the corrupted file. AutoCAD attempts to rebuild the file’s internal structure. Follow with AUDIT (type AUDIT, select Fix) to find and repair object errors. For complex drawings with external references (xrefs), use RECOVERALL, which recovers the master file and all xrefs. These built-in tools repair 60–75% of corruption caused by improper shutdowns or network disconnections during save.
Step 3: Third-party DWG recovery tools
If RECOVER fails, commercial DWG repair tools like DWG Recovery Pro or Stellar Repair for CAD (₹3,000–₹6,000 one-time license) can attempt to extract drawing elements from a damaged file structure. These tools work by reading the DWG binary format at the entity level and reconstructing a valid file from intact segments. Results vary — some drawings recover fully, others recover outlines without annotations or blocks. For engineering drawings with irreplaceable design work, professional DWG recovery services in India (₹2,000–₹5,000) offer better results because they combine tool-based and manual reconstruction.
Step 4: The India angle — network drives and DWG corruption
Indian engineering firms frequently save AutoCAD files directly to network-attached storage or mapped network drives. Power cuts that disconnect the network mid-save leave .dwg files in a half-written state — the file header exists but the entity data is truncated. Using AutoCAD over a VPN to a remote server adds latency that occasionally causes save timeouts with similar results. The fix: always work on a local copy of the .dwg, save locally, and copy to the network drive when done. This eliminates network-caused corruption and dramatically reduces recovery events.
