Error Number 6007 Cadworx May 2026

This is the standard fix for Project ID mismatches.

Once resolved, implement these best practices to avoid recurrence:

CadWorx stores pipe spec and component information as Xdata attached to AutoCAD entities. If this data becomes corrupted (due to a crash, network dropout during save, or third-party LISP routines), the link between the graphic element and the database breaks. error number 6007 cadworx

If any of those aren’t true, substitute equivalent resources (trial installation, test file, or another machine).

When a user opens a Microsoft Access database (.mdb) that CADWorx uses for specs, Access creates a locking file (.ldb in older versions, .laccdb in newer). If CADWorx or Windows crashes unexpectedly, this lock file remains, causing error 6007. This is the standard fix for Project ID mismatches

Choose and test these in parallel or sequentially:

Hypothesis A — File/Path/Permission issue: When a user opens a Microsoft Access database (

Hypothesis B — Corrupted spec or drawing:

Hypothesis C — Software mismatch or bug:

  • Resource constraints: Check disk space, file locks, and concurrent access (multiple users opening same file).
  • Third-party hooks: Look for plugins, LISP routines, or custom pipe/spec libraries that might interfere.

    • Thought prompt: if a seemingly unrelated component (antivirus, network mount) occasionally blocks writes, what failure modes could produce a numeric error like 6007?