diff --git a/compiler/cli/src/org/jetbrains/jet/cli/js/K2JSCompiler.java b/compiler/cli/src/org/jetbrains/jet/cli/js/K2JSCompiler.java
index 74817ba255d..0db96a4a685 100644
--- a/compiler/cli/src/org/jetbrains/jet/cli/js/K2JSCompiler.java
+++ b/compiler/cli/src/org/jetbrains/jet/cli/js/K2JSCompiler.java
@@ -76,19 +76,20 @@ public class K2JSCompiler extends CLICompiler<K2JSCompilerArguments, K2JSCompile
             }
         }, sources);
         if (analyzerWithCompilerReport.hasErrors()) {
-
             return ExitCode.COMPILATION_ERROR;
         }
 
         if (arguments.outputDir != null) {
             try {
-                K2JSTranslator.translateWithCallToMainAndSaveToFile(environmentForJS.getSourceFiles(), arguments.outputDir, config, environmentForJS.getProject());
+                K2JSTranslator.translateWithCallToMainAndSaveToFile(sources, arguments.outputDir, config, environmentForJS.getProject());
             }
             catch (Exception e) {
+                messageCollector.report(CompilerMessageSeverity.ERROR, "Exception while translating:\n" + e.getMessage(),
+                                        CompilerMessageLocation.NO_LOCATION);
                 return ExitCode.INTERNAL_ERROR;
             }
         } else {
-            messageCollector.report(CompilerMessageSeverity.ERROR, "Specify output directory via -output", CompilerMessageLocation.NO_LOCATION);
+            messageCollector.report(CompilerMessageSeverity.ERROR, "Specify output file via -output", CompilerMessageLocation.NO_LOCATION);
             return ExitCode.INTERNAL_ERROR;
         }
         return ExitCode.OK;
diff --git a/idea/src/org/jetbrains/jet/plugin/compiler/K2JSCompiler.java b/idea/src/org/jetbrains/jet/plugin/compiler/K2JSCompiler.java
index 001f88398ea..06e685647b8 100644
--- a/idea/src/org/jetbrains/jet/plugin/compiler/K2JSCompiler.java
+++ b/idea/src/org/jetbrains/jet/plugin/compiler/K2JSCompiler.java
@@ -28,6 +28,7 @@ import com.intellij.util.Chunk;
 import jet.Function1;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.plugin.JetFileType;
+import org.jetbrains.jet.plugin.k2jsrun.K2JSRunnerUtils;
 import org.jetbrains.jet.plugin.project.JsModuleDetector;
 
 import java.io.PrintStream;
@@ -90,20 +91,21 @@ public final class K2JSCompiler implements TranslatingCompiler {
                                    -1);
                 return -1;
             }
-            String[] commandLineArgs = constructArguments(context.getModuleOutputDirectory(module), roots[0]);
+            String[] commandLineArgs = constructArguments(context.getProject(), context.getModuleOutputDirectory(module), roots[0]);
             Object rc = invokeExecMethod(environment, out, context, commandLineArgs, "org.jetbrains.jet.cli.js.K2JSCompiler");
             return CompilerUtils.getReturnCodeFromObject(rc);
         }
         catch (Throwable e) {
-             context.addMessage(CompilerMessageCategory.ERROR, "Exception while executing: " + e.getMessage(), null, -1, -1);
+             context.addMessage(CompilerMessageCategory.ERROR, "Exception while executing compiler: " + e.getMessage(), null, -1, -1);
         }
         return -1;
     }
 
-    private static String[] constructArguments(@NotNull VirtualFile outDir, @NotNull VirtualFile srcDir) {
+    private static String[] constructArguments(@NotNull Project project, @NotNull VirtualFile outDir, @NotNull VirtualFile srcDir) {
         String srcPath = srcDir.getPath();
         String outPath = outDir.getPath();
-        return new String[] {"-tags", "-verbose", "-version", "-srcdir", srcPath, "-output", outPath};
+        String outFile = K2JSRunnerUtils.constructPathToGeneratedFile(project, outPath);
+        return new String[] {"-tags", "-verbose", "-version", "-srcdir", srcPath, "-output", outFile};
     }
 
     @NotNull
diff --git a/idea/src/org/jetbrains/jet/plugin/k2jsrun/K2JSRunnerUtils.java b/idea/src/org/jetbrains/jet/plugin/k2jsrun/K2JSRunnerUtils.java
index f508cc8f9c9..6f794f315f5 100644
--- a/idea/src/org/jetbrains/jet/plugin/k2jsrun/K2JSRunnerUtils.java
+++ b/idea/src/org/jetbrains/jet/plugin/k2jsrun/K2JSRunnerUtils.java
@@ -70,7 +70,7 @@ public final class K2JSRunnerUtils {
         notifySuccess(outputDirPath);
     }
 
-    private static String constructPathToGeneratedFile(Project project, String outputDirPath) {
+    public static String constructPathToGeneratedFile(@NotNull Project project, @NotNull String outputDirPath) {
         return outputDirPath + "/" + project.getName() + ".js";
     }