Repair and Recovery

When an error occurs, diagnostic information is recorded in the acad.err file, which you can use to report a problem.

A drawing file is marked as damaged if corrupted data is detected, or if you request that the drawing be saved after a program failure. If the damage is minor, sometimes you can repair the drawing simply by opening it. Otherwise, you can use the following:

• RECOVER. Performs an audit on, and attempts to open, any drawing file.
• RECOVERALL. Similar to recover, it additionally operates on all nested xrefs. The results are displayed in the Drawing Recovery Log window.
• AUDIT. Finds and corrects errors in the currently open drawing file.

Example: Auditing Files

Auditing a file generates a description of problems with a drawing file and recommendations for correcting them. As you start the audit, you specify whether you want the program to try to fix the problems it encounters. The report is similar to the following example:

Auditing Header

DXF NAME Current Value Validation Default

PDMODE 990 - 2040

UCSFOLLOW 811 or 0

Error found in auditing header variables

4 Blocks audited

Pass 1 4 objects audited

Pass 2 4 objects audited

Total errors found 2 fixed 2

If you chose not to correct the errors, the last statement changes to

Total errors found 2 fixed 0.

The output from a recovery audit is written to an audit log (ADT) file if the AUDITCTL system variable is set to 1 (On).

Recovery does not necessarily preserve the high-level consistency of the drawing file. The program extracts as much material as it can from the damaged file.