If you try to place a revision cloud and receive the error:
_revcloud - no function definition: INIT_BONUS_ERROR
you are dealing with a broken function call inside AutoCAD’s initialization chain. The command is being triggered, but one of the required routines is not loaded in memory. In most cases, this involves Express Tools, a corrupted LISP environment, or a damaged CUI configuration.
This guide expands on the common causes and walks through a structured diagnostic process—from quick verification to deep cleanup—without removing any of the original troubleshooting logic.
Understanding the Core Problem
The error message references INIT_BONUS_ERROR, which is tied to the legacy Bonus Tools / Express Tools library. While REVCLOUD has been a native command for years, parts of its initialization and error-handling chain may still reference supporting libraries depending on configuration and migration history.
The failure occurs when:
- A required function is missing from memory
- A LISP file that redefines REVCLOUD loads before the native command
- An outdated support path overrides the 2025 libraries
- The Express Tools module is not initialized
- A corrupted CUIX macro redirects the command
When initialization fails, AutoCAD may misinterpret subsequent keystrokes, which is why REVCLOUD sometimes appears to call PAN or FILLET instead of drawing arcs.
Step 1 – Verify and Reload Express Tools
Because the error explicitly references a Bonus function, start here.
- Type:
EXPRESSMENU
If the Express Tools ribbon appears or refreshes, test REVCLOUD again.
If the command is unrecognized:
- Go to Control Panel > Programs and Features
- Select AutoCAD 2025
- Click Uninstall/Change
- Choose Add or Remove Features
- Ensure Express Tools is installed
Even though REVCLOUD is native in modern releases, missing Express Tools can still break legacy initialization routines.
Step 2 – Force the Native Command
Custom aliases and LISP redefinitions commonly override built-in commands.
Type:
._REVCLOUD
The dot forces AutoCAD to use the original internal command. The underscore forces English command translation.
If this works, you have a LISP or macro conflict.
Step 3 – Use REINIT Before Restarting
Before resetting everything, try reloading support files:
REINIT
Check:
- LISP Files
- Express Tools
This reloads definitions without restarting AutoCAD.
If the issue resolves, the problem was a failed load sequence during startup.
Step 4 – Check for LISP Conflicts
If you migrated settings from an older version (for example, from AutoCAD 2002 or 2010), legacy LISP files may be auto-loading.
4.1 Check Startup Suite
Type:
APPLOAD
Open Startup Suite and remove:
- Any legacy REVCLOUD customizations
- Old Express Tool overrides
- Files referencing older installations
4.2 Inspect Support File Search Path
Go to:
OPTIONS > Files > Support File Search Path
Ensure:
- AutoCAD 2025 paths are at the top
- No directories point to older installations
- No network paths override core libraries
Incorrect search path order can cause the wrong LISP or FAS file to load first.
Step 5 – Verify REVCLOUD Is Not Redefined in CUI
Corrupted workspaces can redefine commands at the macro level.
Type:
CUI
Check:
- The Command List for REVCLOUD
- Any macro redefinitions
- Workspace-specific overrides
If the macro references external LISP calls, remove or reset it.
A damaged CUIX file is a common cause when LISP diagnostics show nothing wrong.
Step 6 – Test With a Clean Profile
Instead of resetting the entire installation:
- Go to:
OPTIONS > Profiles
- Create a new profile
- Set it current
- Restart AutoCAD
If REVCLOUD works under a new profile, your primary profile is corrupted.
This method preserves your environment while isolating the issue.
Step 7 – Deep Diagnostic for Advanced Users
If you want to verify whether Express Tool files are actually being found:
Type:
VLIDE
Then test:
(findfile "acetutil.fas")
If the result returns nil, the Express Tools library is not being located in the support path.
That confirms a pathing issue rather than a command-level failure.
Step 8 – Check Relevant System Variables
Corrupted variables can affect command behavior. Verify:
- REVCLOUDARCVARIANCE
- REVCLOUDCREATEMODE
- CMDECHO
Reset suspicious values using:
SETVAR
While these rarely trigger INIT_BONUS_ERROR directly, they can create abnormal behavior after partial command failure.
Step 9 – Ensure AutoCAD 2025 Is Fully Patched
Certain early builds of AutoCAD 2025 have shown pathing inconsistencies after updates.
Open:
ABOUT
Confirm you are running at least Update 2025.1 (v1.3 baseline or later).
If uncertain, install the latest update from Autodesk.
If issues persist after patching, perform:
Reset Settings to Default
Accessible from:
Windows Start Menu > AutoCAD 2025 > Reset Settings to Default
This is often faster than manually tracing layered corruption.
Why REVCLOUD Sometimes Triggers PAN or FILLET
When initialization fails, the command macro aborts mid-sequence. The next letter you type—such as “P” or “F”—is interpreted as a new command.
This is not random behavior. It is a failed macro chain, not a keyboard issue.
Can You Copy REVCLOUD Files From an Older Version?
No.
Modern AutoCAD versions use different handling for:
- Compiled LISP (FAS/VLX)
- Support path architecture
- CUI macro linking
Copying files from AutoCAD 2002 or similar legacy versions will likely produce instability or internal errors.
Is This a Windows Issue?
Rarely.
While Windows updates can affect permissions, INIT_BONUS_ERROR is almost always internal to AutoCAD, specifically:
- Support path conflicts
- Missing Express Tools
- Corrupted LISP environment
- Damaged CUI profile
FAQ
Why does my Revcloud try to run PAN or FILLET?
Because the command macro failed during initialization. AutoCAD interprets your next keystroke as a separate command.
I don’t use Express Tools. Do I still need them?
In most current installations, REVCLOUD is native. However, certain initialization routines still reference legacy libraries. If Express Tools are missing or not initialized, the command chain can fail.
Does using ._REVCLOUD permanently fix the problem?
No. It bypasses redefined commands for that session. It does not correct corrupted startup files or profile issues.
What is the fastest full reset method?
If structured troubleshooting fails:
- Reset your AutoCAD profile
- If necessary, run Reset Settings to Default
This resolves most layered configuration corruption in minutes.
How do I confirm Express Tools are loading correctly?
Run:
(findfile "acetutil.fas")
If AutoCAD returns a valid path, the library is found. If it returns nil, correct your support file search paths.
This issue is rarely random. It is almost always the result of migration artifacts, path conflicts, or partial tool installation. Following the steps above in order will isolate the cause and restore the REVCLOUD command to normal behavior.
