pentaho/pentaho-kettle · error · KettleValueException

ScriptValuesMod.Log.CouldNotAddDefaultConstants

Error message

ScriptValuesMod.Log.CouldNotAddDefaultConstants

What it means

Thrown by ScriptValuesMod.addValues() when registering the built-in transformation constants (ABORT_TRANSFORMATION, ERROR_TRANSFORMATION, CONTINUE_TRANSFORMATION) into the JavaScript scope fails. The step wraps Context/Scope initialization in a try-catch and rethrows any Exception as a KettleValueException with this localized message, chaining the original cause. It means the Rhino scripting environment could not be seeded with default constants before running the user script.

Solutions

1. Read the chained cause ('Caused by') of the KettleValueException to identify the underlying Rhino error
2. Restart the transformation/Kettle JVM to reset the scripting Context
3. Check for mismatched Rhino/Mozilla JavaScript library versions on the classpath (duplicate js.jar)
4. Verify the step is not being initialized concurrently/re-entrantly with a shared scope
5. Upgrade to a Pentaho/Kettle version with fixed script values mod initialization

Example fix

// before: catching generic Exception hides the real cause
throw new KettleValueException( BaseMessages.getString( PKG, "ScriptValuesMod.Log.CouldNotAddDefaultConstants" ), ex );
// after (user side): inspect the full cause chain
try {
  step.processRow( meta, data );
} catch ( KettleValueException e ) {
  logError( "Script init failed", e ); // full stacktrace shows Rhino root cause
  throw e;
}

// Before running, ensure no duplicate Rhino js jars and a fresh JVM
// e.g. in a shell: find $KETTLE_CLASSPATH -name 'js*.jar' | sort  # should list at most one

try {
  step.processRow( meta, data );
} catch ( KettleValueException e ) {
  Throwable root = e;
  while ( root.getCause() != null ) { root = root.getCause(); }
  logError( "Script constants init failed, root cause: " + root, e );
  throw e;
}

When it happens

Trigger: An Exception (e.g. Rhino ContextException or illegal scope state) is raised while calling data.scope.put(...) for ABORT_TRANSFORMATION / ERROR_TRANSFORMATION / CONTINUE_TRANSFORMATION inside addValues(), invoked from processRow during step initialization of the Modified Java Script Value step.

Common situations: Corrupted or re-entered Rhino Context (Context.enter/exit imbalance), a non-scriptable or already-finalized scope object, or an unexpected internal Rhino exception during scope property definition; typically seen after JVM/Rhino version changes rather than by user misconfiguration.

Related errors

• Error in isEmpty function:
• The function call getLastModifiedTime is not valid.
• The function call isEmpty is not valid
• The function call trunc requires 1 argument, a number.
• Argument of TRUNC of date has to be between 0 and 5

AI-assisted analysis of pentaho/pentaho-kettle@f3058517a1 (2026-09-13). Data as JSON: /api/errors/9d7e77df092de506. Report an issue: GitHub.

Appendix: source

Thrown at engine/src/main/java/org/pentaho/di/trans/steps/scriptvalues_mod/ScriptValuesMod.java:288

            ScriptValuesAddedFunctions.jsFunctionList, ScriptValuesAddedFunctions.class,
            ScriptableObject.DONTENUM );
        } catch ( Exception ex ) {
          // System.out.println(ex.toString());
          throw new KettleValueException( BaseMessages.getString(
            PKG, "ScriptValuesMod.Log.CouldNotAddDefaultFunctions" ), ex );
        }

        // Adding some Constants to the JavaScript
        try {

          data.scope.put( "SKIP_TRANSFORMATION", data.scope, Integer.valueOf( SKIP_TRANSFORMATION ) );
          data.scope.put( "ABORT_TRANSFORMATION", data.scope, Integer.valueOf( ABORT_TRANSFORMATION ) );
          data.scope.put( "ERROR_TRANSFORMATION", data.scope, Integer.valueOf( ERROR_TRANSFORMATION ) );
          data.scope.put( "CONTINUE_TRANSFORMATION", data.scope, Integer.valueOf( CONTINUE_TRANSFORMATION ) );

        } catch ( Exception ex ) {
          // System.out.println("Exception Adding the Constants " + ex.toString());
          throw new KettleValueException( BaseMessages.getString(
            PKG, "ScriptValuesMod.Log.CouldNotAddDefaultConstants" ), ex );
        }

        try {
          // Checking for StartScript
          if ( strStartScript != null && strStartScript.length() > 0 ) {
            Script startScript = data.cx.compileString( strStartScript, "trans_Start", 1, null );
            startScript.exec( data.cx, data.scope );
            if ( log.isDetailed() ) {
              logDetailed( ( "Start Script found!" ) );
            }
          } else {
            if ( log.isDetailed() ) {
              logDetailed( ( "No starting Script found!" ) );
            }
          }
        } catch ( Exception es ) {
          // System.out.println("Exception processing StartScript " + es.toString());

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