diff --git a/java/src/processing/mode/java/pdex/ASTGenerator.java b/java/src/processing/mode/java/pdex/ASTGenerator.java
index a1ff08b54..5368765e6 100644
--- a/java/src/processing/mode/java/pdex/ASTGenerator.java
+++ b/java/src/processing/mode/java/pdex/ASTGenerator.java
@@ -342,7 +342,7 @@ public class ASTGenerator {
       }
       jdocMap.put(methodName, msg);
     }
-    System.out.println("JDoc loaded " + jdocMap.size());
+    //System.out.println("JDoc loaded " + jdocMap.size());
   }
 
 
@@ -1522,7 +1522,7 @@ public class ASTGenerator {
     } else if (parent instanceof Block) {
       nodes = ((Block) parent).statements();
     } else {
-      System.err.println("findClosestNode() found " + getNodeAsString(parent));
+      log("findClosestNode() found " + getNodeAsString(parent));
       return null;
     }
 
diff --git a/java/src/processing/mode/java/pdex/ErrorCheckerService.java b/java/src/processing/mode/java/pdex/ErrorCheckerService.java
index 524733530..5cbea9d0f 100644
--- a/java/src/processing/mode/java/pdex/ErrorCheckerService.java
+++ b/java/src/processing/mode/java/pdex/ErrorCheckerService.java
@@ -112,12 +112,12 @@ public class ErrorCheckerService {
   /**
    * URLs of extra imports jar files stored here.
    */
-  protected URL[] classPath;
+  protected URL[] classPath = {};
 
   /**
-   * Stores all Problems in the sketch
+   * Class loader used by compiler check and ASTGenerator, based on classPath
    */
-  //public List<Problem> problemsList;
+  protected URLClassLoader classLoader = new URLClassLoader(classPath);
 
   /**
    * How many lines are present till the initial class declaration? In static
@@ -165,6 +165,11 @@ public class ErrorCheckerService {
    */
   protected final XQPreprocessor xqpreproc;
 
+  /**
+   * ASTGenerator for operations on AST
+   */
+  protected final ASTGenerator astGenerator;
+
   /**
    * Regexp for import statements. (Used from Processing source)
    */
@@ -180,10 +185,11 @@ public class ErrorCheckerService {
 
   /**
    * Error checking doesn't happen before this interval has ellapsed since the
-   * last runManualErrorCheck() call.
+   * last request() call.
    */
   private final static long errorCheckInterval = 650;
 
+  protected volatile CodeCheckResult lastCodeCheckResult = new CodeCheckResult();
 
   private Thread errorCheckerThread;
   private final BlockingQueue<Boolean> requestQueue = new ArrayBlockingQueue<>(1);
@@ -286,6 +292,7 @@ public class ErrorCheckerService {
     errorCheckerThread.start();
   }
 
+
   public void stop() {
     cancel();
     running = false;
@@ -332,8 +339,6 @@ public class ErrorCheckerService {
   }
 
 
-  protected final ASTGenerator astGenerator;
-
   public ASTGenerator getASTGenerator() {
     return astGenerator;
   }
@@ -488,8 +493,6 @@ public class ErrorCheckerService {
     return result;
   }
 
-  protected volatile CodeCheckResult lastCodeCheckResult = new CodeCheckResult();
-
   public boolean hasSyntaxErrors(){
     return lastCodeCheckResult.syntaxErrors;
   }
@@ -498,8 +501,6 @@ public class ErrorCheckerService {
     return lastCodeCheckResult.containsErrors;
   }
 
-  protected URLClassLoader classLoader;
-
   /**
    * Performs compiler error check.
    * @param sourceName - name of the class