diff --git a/src/main/java/org/eolang/jeo/representation/DataType.java b/src/main/java/org/eolang/jeo/representation/DataType.java
index af8eb046d..bb9470ffc 100644
--- a/src/main/java/org/eolang/jeo/representation/DataType.java
+++ b/src/main/java/org/eolang/jeo/representation/DataType.java
@@ -240,6 +240,14 @@ private static byte[] hexClass(final String name) {
     private static DataType from(final Object data) {
         return Arrays.stream(DataType.values()).filter(type -> type.clazz.isInstance(data))
             .findFirst()
-            .orElseThrow(() -> new IllegalArgumentException("Unknown data type"));
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "Unknown data type of %s, class is %s",
+                        data,
+                        data.getClass().getName()
+                    )
+                )
+            );
     }
 }
diff --git a/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethod.java b/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethod.java
index 4fbedda96..e350db71b 100644
--- a/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethod.java
+++ b/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethod.java
@@ -24,6 +24,7 @@
 package org.eolang.jeo.representation.directives;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import org.xembly.Directive;
@@ -60,6 +61,13 @@ public final class DirectivesMethod implements Iterable<Directive> {
      */
     private final boolean counting;
 
+    /**
+     * Constructor.
+     */
+    public DirectivesMethod() {
+        this("testMethod");
+    }
+
     /**
      * Constructor.
      * @param name Method name
diff --git a/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitor.java b/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitor.java
index 3ee3660d2..d66913204 100644
--- a/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitor.java
+++ b/src/main/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitor.java
@@ -23,8 +23,11 @@
  */
 package org.eolang.jeo.representation.directives;
 
+import java.util.Arrays;
 import java.util.Iterator;
+import java.util.stream.Stream;
 import org.eolang.jeo.representation.DefaultVersion;
+import org.objectweb.asm.AnnotationVisitor;
 import org.objectweb.asm.Handle;
 import org.objectweb.asm.Label;
 import org.objectweb.asm.MethodVisitor;
@@ -58,6 +61,10 @@ public final class DirectivesMethodVisitor extends MethodVisitor implements Iter
      */
     private final DirectivesMethod method;
 
+    DirectivesMethodVisitor(final DirectivesMethod method) {
+        this(method, new DummyMethodVisitor());
+    }
+
     /**
      * Constructor.
      * @param method Method
@@ -143,6 +150,7 @@ public void visitInvokeDynamicInsn(
         final Handle handler,
         final Object... arguments
     ) {
+        this.opcode(Opcodes.INVOKEDYNAMIC, name, descriptor, handler, arguments);
         super.visitInvokeDynamicInsn(
             name,
             descriptor,
@@ -151,6 +159,47 @@ public void visitInvokeDynamicInsn(
         );
     }
 
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        this.opcode(Opcodes.MULTIANEWARRAY, descriptor, numDimensions);
+        super.visitMultiANewArrayInsn(descriptor, numDimensions);
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        this.opcode(Opcodes.IINC, varIndex, increment);
+        super.visitIincInsn(varIndex, increment);
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        this.method.opcode(
+            Opcodes.LOOKUPSWITCH,
+            Stream.concat(
+                Stream.of(dflt),
+                Stream.concat(
+                    Arrays.stream(keys).boxed(),
+                    Stream.of(labels)
+                )
+            ).toArray(Object[]::new)
+        );
+        super.visitLookupSwitchInsn(dflt, keys, labels);
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+        final int min, final int max, final Label dflt, final Label... labels
+    ) {
+        this.opcode(
+            Opcodes.TABLESWITCH,
+            Stream.concat(
+                Stream.of(min, max, dflt),
+                Arrays.stream(labels)
+            ).toArray(Object[]::new)
+        );
+        super.visitTableSwitchInsn(min, max, dflt, labels);
+    }
+
     @Override
     public void visitTryCatchBlock(
         final Label start,
@@ -175,4 +224,19 @@ public Iterator<Directive> iterator() {
     private void opcode(final int opcode, final Object... operands) {
         this.method.opcode(opcode, operands);
     }
+
+    /**
+     * Dummy method visitor.
+     * This method visitor does nothing.
+     * It is used in tests.
+     * @since 0.3
+     */
+    private static class DummyMethodVisitor extends MethodVisitor {
+        /**
+         * Constructor.
+         */
+        DummyMethodVisitor() {
+            super(new DefaultVersion().api());
+        }
+    }
 }
diff --git a/src/test/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitorTest.java b/src/test/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitorTest.java
index a239026e7..c791ce00f 100644
--- a/src/test/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitorTest.java
+++ b/src/test/java/org/eolang/jeo/representation/directives/DirectivesMethodVisitorTest.java
@@ -368,4 +368,70 @@ void doesNotContainTryCatchBlock() {
             Matchers.not(Matchers.containsString("trycatchblocks"))
         );
     }
+
+    @Test
+    void visitsMultiArrayInstructionSuccessfully() throws ImpossibleModificationException {
+        final DirectivesMethod method = new DirectivesMethod();
+        new DirectivesMethodVisitor(method).visitMultiANewArrayInsn("java/lang/String", 2);
+        MatcherAssert.assertThat(
+            "MultiArray instruction wasn't visited successfully.",
+            new Xembler(method).xml(),
+            Matchers.allOf(
+                Matchers.containsString("MULTIANEWARRAY"),
+                Matchers.containsString("2")
+            )
+        );
+    }
+
+    @Test
+    void visitsIisncInstructionSuccessfully() throws ImpossibleModificationException {
+        final DirectivesMethod method = new DirectivesMethod();
+        new DirectivesMethodVisitor(method).visitIincInsn(1, 2);
+        MatcherAssert.assertThat(
+            "Iinc instruction wasn't visited successfully.",
+            new Xembler(method).xml(),
+            Matchers.allOf(
+                Matchers.containsString("IINC"),
+                Matchers.containsString("1"),
+                Matchers.containsString("2")
+            )
+        );
+    }
+
+    @Test
+    void visitsLookupSwitchInstructionSuccessfully() throws ImpossibleModificationException {
+        final DirectivesMethod method = new DirectivesMethod();
+        new DirectivesMethodVisitor(method).visitLookupSwitchInsn(
+            new Label(), new int[]{1, 2, 3}, new Label[]{new Label(), new Label(), new Label()}
+        );
+        MatcherAssert.assertThat(
+            "LookupSwitch instruction wasn't visited successfully.",
+            new Xembler(method).xml(),
+            Matchers.allOf(
+                Matchers.containsString("LOOKUPSWITCH"),
+                Matchers.containsString("1"),
+                Matchers.containsString("2"),
+                Matchers.containsString("3"),
+                Matchers.containsString("label")
+            )
+        );
+    }
+
+    @Test
+    void visitsTableSwitchInstructionSuccessfully() throws ImpossibleModificationException {
+        final DirectivesMethod method = new DirectivesMethod();
+        new DirectivesMethodVisitor(method).visitTableSwitchInsn(
+            1, 3, new Label(), new Label[]{new Label(), new Label(), new Label()}
+        );
+        MatcherAssert.assertThat(
+            "TableSwitch instruction wasn't visited successfully.",
+            new Xembler(method).xml(),
+            Matchers.allOf(
+                Matchers.containsString("TABLESWITCH"),
+                Matchers.containsString("1"),
+                Matchers.containsString("3"),
+                Matchers.containsString("label")
+            )
+        );
+    }
 }