diff --git a/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptDebugTarget.java b/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptDebugTarget.java
index 04865f4..a2a8666 100644
--- a/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptDebugTarget.java
+++ b/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptDebugTarget.java
@@ -27,7 +27,6 @@
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.ListenerList;
-import org.eclipse.core.runtime.Preferences;
 import org.eclipse.debug.core.DebugException;
 import org.eclipse.debug.core.DebugPlugin;
 import org.eclipse.debug.core.IBreakpointManager;
@@ -39,8 +38,6 @@
 import org.eclipse.debug.core.model.IProcess;
 import org.eclipse.debug.core.model.IThread;
 import org.eclipse.dltk.dbgp.exceptions.DbgpException;
-import org.eclipse.dltk.debug.core.DLTKDebugPlugin;
-import org.eclipse.dltk.debug.core.DebugPreferenceConstants;
 import org.eclipse.dltk.debug.core.IDbgpService;
 import org.eclipse.dltk.debug.core.model.IScriptDebugTarget;
 import org.eclipse.dltk.debug.core.model.IScriptDebugTargetListener;
diff --git a/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStack.java b/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStack.java
index 1b469ca..6c88e76 100644
--- a/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStack.java
+++ b/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStack.java
@@ -1,5 +1,6 @@
 package org.eclipse.dltk.internal.debug.core.model;
 
+import org.eclipse.dltk.core.DLTKCore;
 import org.eclipse.dltk.dbgp.IDbgpStackLevel;
 import org.eclipse.dltk.dbgp.commands.IDbgpStatckCommands;
 import org.eclipse.dltk.dbgp.exceptions.DbgpException;
@@ -38,7 +39,9 @@
 		try {
 			this.frames = readFrames(thread.getDbgpSession().getCoreCommands());
 		} catch (DbgpException e) {
-			// TODO: log exception
+			if (DLTKCore.DEBUG) {
+				e.printStackTrace();
+			}
 		}
 	}
 
diff --git a/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStackFrame.java b/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStackFrame.java
index b0f3f3d..74426b7 100644
--- a/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStackFrame.java
+++ b/core/plugins/org.eclipse.dltk.debug/src/org/eclipse/dltk/internal/debug/core/model/ScriptStackFrame.java
@@ -21,9 +21,11 @@
 import org.eclipse.debug.core.model.IRegisterGroup;
 import org.eclipse.debug.core.model.IThread;
 import org.eclipse.debug.core.model.IVariable;
+import org.eclipse.dltk.core.DLTKCore;
 import org.eclipse.dltk.dbgp.IDbgpProperty;
 import org.eclipse.dltk.dbgp.IDbgpStackLevel;
 import org.eclipse.dltk.dbgp.commands.IDbgpContextCommands;
+import org.eclipse.dltk.dbgp.exceptions.DbgpDebuggingEngineException;
 import org.eclipse.dltk.dbgp.exceptions.DbgpException;
 import org.eclipse.dltk.debug.core.DLTKDebugPlugin;
 import org.eclipse.dltk.debug.core.DebugPreferenceConstants;
@@ -49,16 +51,23 @@
 			ScriptStackFrame parentFrame, int contextId,
 			IDbgpContextCommands commands) throws DbgpException {
 
-		IDbgpProperty[] properties = commands.getContextProperties(parentFrame
-				.getLevel(), contextId);
+		try {
+			IDbgpProperty[] properties = commands.getContextProperties(
+					parentFrame.getLevel(), contextId);
 
-		IScriptVariable[] variables = new IScriptVariable[properties.length];
+			IScriptVariable[] variables = new IScriptVariable[properties.length];
 
-		for (int i = 0; i < properties.length; ++i) {
-			variables[i] = new ScriptVariable(parentFrame, properties[i]);
+			for (int i = 0; i < properties.length; ++i) {
+				variables[i] = new ScriptVariable(parentFrame, properties[i]);
+			}
+
+			return variables;
+		} catch (DbgpDebuggingEngineException e) {
+			if (DLTKCore.DEBUG) {
+				e.printStackTrace();
+			}
+			return new IScriptVariable[0];
 		}
-
-		return variables;
 	}
 
 	protected IScriptVariable[] readAllVariables() throws DbgpException {