diff --git a/eo-maven-plugin/src/main/resources/org/eolang/maven/add_rust/add_rust.xsl b/eo-maven-plugin/src/main/resources/org/eolang/maven/add_rust/add_rust.xsl
index 1d9fb0e77d..5386392bfc 100644
--- a/eo-maven-plugin/src/main/resources/org/eolang/maven/add_rust/add_rust.xsl
+++ b/eo-maven-plugin/src/main/resources/org/eolang/maven/add_rust/add_rust.xsl
@@ -32,10 +32,10 @@ SOFTWARE.
       <rusts>
         <xsl:comment>"Rust inserts"</xsl:comment>
         <xsl:for-each select="//o">
-          <xsl:if test="../attribute(base) = '.rust' and attribute(base) = 'org.eolang.string'">
+          <xsl:if test="(../attribute(base) = 'org.eolang.rust' or (../attribute(base) = '.rust' and ../o[1]/attribute(base) = '.eolang' and ../o[1]/o[1]/attribute(base) = '.org' and ../o[1]/o[1]/o[1]/attribute(base) = 'Q')) and (attribute(base) = 'org.eolang.string' or (attribute(base) = '.string' and o[1]/attribute(base) = '.eolang' and o[1]/o[1]/attribute(base) = '.org' and o[1]/o[1]/o[1]/attribute(base) = 'Q'))">
             <rust>
               <xsl:attribute name="code">
-                <xsl:value-of select="./o/text()"/>
+                <xsl:value-of select="./o[@data = 'bytes']/text()"/>
               </xsl:attribute>
               <xsl:attribute name="code_loc">
                 <xsl:value-of select="attribute(loc)"/>
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/BinarizeParseTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/BinarizeParseTest.java
index cabac1dc77..061136df77 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/BinarizeParseTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/BinarizeParseTest.java
@@ -151,7 +151,7 @@ void binarizesTwiceRustProgram(@TempDir final Path temp) throws Exception {
     @ClasspathSource(value = "org/eolang/maven/binarize/add_rust/", glob = "**.yaml")
     void createsDependenciesSection(final String yaml) {
         MatcherAssert.assertThat(
-            BinarizeParseTest.TO_ADD_MESSAGE,
+            "Yaml tests should pass",
             new XaxStory(yaml),
             Matchers.is(true)
         );
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/binarize/add_rust/detects-rust-with-wide-string.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/binarize/add_rust/detects-rust-with-wide-string.yaml
new file mode 100644
index 0000000000..83b3e02e67
--- /dev/null
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/binarize/add_rust/detects-rust-with-wide-string.yaml
@@ -0,0 +1,166 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2016-2024 Objectionary.com
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+---
+sheets:
+  - /org/eolang/maven/add_rust/add_rust.xsl
+document:
+  <!--Check the case if string has base ".string" instead of "org.eolang.string"-->
+  <program>
+     <objects>
+        <o abstract=""
+           line="29"
+           loc="Φ.org.eolang.rust-with-string-fqn"
+           name="rust-with-string-fqn"
+           original-name="rust-with-string-fqn"
+           pos="0">
+           <o base=".rust"
+              line="33"
+              loc="Φ.org.eolang.rust-with-string-fqn.r"
+              name="r"
+              pos="2">
+              <o base=".eolang"
+                 line="32"
+                 loc="Φ.org.eolang.rust-with-string-fqn.r.ρ"
+                 pos="2">
+                 <o base=".org"
+                    line="31"
+                    loc="Φ.org.eolang.rust-with-string-fqn.r.ρ.ρ"
+                    pos="2">
+                    <o base="Q"
+                       line="30"
+                       loc="Φ.org.eolang.rust-with-string-fqn.r.ρ.ρ.ρ"
+                       pos="2"/>
+                 </o>
+              </o>
+              <o as="0"
+                 base=".string"
+                 line="37"
+                 loc="Φ.org.eolang.rust-with-string-fqn.r.α0"
+                 pos="4">
+                 <o base=".eolang"
+                    line="36"
+                    loc="Φ.org.eolang.rust-with-string-fqn.r.α0.ρ"
+                    pos="4">
+                    <o base=".org"
+                       line="35"
+                       loc="Φ.org.eolang.rust-with-string-fqn.r.α0.ρ.ρ"
+                       pos="4">
+                       <o base="Q"
+                          line="34"
+                          loc="Φ.org.eolang.rust-with-string-fqn.r.α0.ρ.ρ.ρ"
+                          pos="4"/>
+                    </o>
+                 </o>
+                 <o as="0"
+                    base="org.eolang.bytes"
+                    data="bytes"
+                    line="41"
+                    loc="Φ.org.eolang.rust-with-string-fqn.r.α0.α0"
+                    pos="6">75 73 65 20 65 6F 3A 3A 50 6F 72 74 61 6C 3B 0A 75 73 65 20 65 6F 3A 3A 65 6F 5F 65 6E 75 6D 3A 3A 45 4F 3B 0A 75 73 65 20 65 6F 3A 3A 65 6F 5F 65 6E 75 6D 3A 3A 45 4F 3A 3A 7B 45 4F 49 6E 74 7D 3B 0A 0A 70 75 62 20 66 6E 20 66 6F 6F 28 5F 70 6F 72 74 61 6C 3A 20 26 6D 75 74 20 50 6F 72 74 61 6C 29 20 2D 3E 20 4F 70 74 69 6F 6E 3C 45 4F 3E 20 7B 0A 20 20 70 72 69 6E 74 6C 6E 21 28 22 48 65 6C 6C 6F 20 77 6F 72 6C 64 20 66 72 6F 6D 20 72 75 73 74 22 29 3B 0A 20 20 53 6F 6D 65 28 45 4F 49 6E 74 28 32 29 29 0A 7D</o>
+              </o>
+              <o as="1"
+                 base="rust-with-string-fqn$t0$a2"
+                 cut="8"
+                 line="43"
+                 loc="Φ.org.eolang.rust-with-string-fqn.r.α1"
+                 pos="4"
+                 ref="43"/>
+              <o as="2"
+                 base=".empty"
+                 line="48"
+                 loc="Φ.org.eolang.rust-with-string-fqn.r.α2"
+                 pos="4">
+                 <o base=".tuple"
+                    line="47"
+                    loc="Φ.org.eolang.rust-with-string-fqn.r.α2.ρ"
+                    pos="4">
+                    <o base=".eolang"
+                       line="46"
+                       loc="Φ.org.eolang.rust-with-string-fqn.r.α2.ρ.ρ"
+                       pos="4">
+                       <o base=".org"
+                          line="45"
+                          loc="Φ.org.eolang.rust-with-string-fqn.r.α2.ρ.ρ.ρ"
+                          pos="4">
+                          <o base="Q"
+                             line="44"
+                             loc="Φ.org.eolang.rust-with-string-fqn.r.α2.ρ.ρ.ρ.ρ"
+                             pos="4"/>
+                       </o>
+                    </o>
+                 </o>
+              </o>
+           </o>
+           <o base=".eq"
+              line="51"
+              loc="Φ.org.eolang.rust-with-string-fqn.φ"
+              name="@"
+              pos="2">
+              <o base=".r"
+                 line="50"
+                 loc="Φ.org.eolang.rust-with-string-fqn.φ.ρ"
+                 pos="2">
+                 <o base="$"
+                    line="49"
+                    loc="Φ.org.eolang.rust-with-string-fqn.φ.ρ.ρ"
+                    pos="2"/>
+              </o>
+              <o as="0"
+                 base=".int"
+                 line="55"
+                 loc="Φ.org.eolang.rust-with-string-fqn.φ.α0"
+                 pos="4">
+                 <o base=".eolang"
+                    line="54"
+                    loc="Φ.org.eolang.rust-with-string-fqn.φ.α0.ρ"
+                    pos="4">
+                    <o base=".org"
+                       line="53"
+                       loc="Φ.org.eolang.rust-with-string-fqn.φ.α0.ρ.ρ"
+                       pos="4">
+                       <o base="Q"
+                          line="52"
+                          loc="Φ.org.eolang.rust-with-string-fqn.φ.α0.ρ.ρ.ρ"
+                          pos="4"/>
+                    </o>
+                 </o>
+                 <o as="0"
+                    base="org.eolang.bytes"
+                    data="bytes"
+                    line="59"
+                    loc="Φ.org.eolang.rust-with-string-fqn.φ.α0.α0"
+                    pos="6">00 00 00 00 00 00 00 02</o>
+              </o>
+           </o>
+        </o>
+        <o abstract=""
+           ancestors="1"
+           as="1"
+           line="43"
+           loc="Φ.org.eolang.rust-with-string-fqn$t0$a2"
+           name="rust-with-string-fqn$t0$a2"
+           parent="rust-with-string-fqn"
+           pos="4"/>
+     </objects>
+  </program>
+asserts:
+  - /program/rusts/rust[@code_loc='Φ.org.eolang.rust-with-string-fqn.r.α0' and @code='75 73 65 20 65 6F 3A 3A 50 6F 72 74 61 6C 3B 0A 75 73 65 20 65 6F 3A 3A 65 6F 5F 65 6E 75 6D 3A 3A 45 4F 3B 0A 75 73 65 20 65 6F 3A 3A 65 6F 5F 65 6E 75 6D 3A 3A 45 4F 3A 3A 7B 45 4F 49 6E 74 7D 3B 0A 0A 70 75 62 20 66 6E 20 66 6F 6F 28 5F 70 6F 72 74 61 6C 3A 20 26 6D 75 74 20 50 6F 72 74 61 6C 29 20 2D 3E 20 4F 70 74 69 6F 6E 3C 45 4F 3E 20 7B 0A 20 20 70 72 69 6E 74 6C 6E 21 28 22 48 65 6C 6C 6F 20 77 6F 72 6C 64 20 66 72 6F 6D 20 72 75 73 74 22 29 3B 0A 20 20 53 6F 6D 65 28 45 4F 49 6E 74 28 32 29 29 0A 7D']
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java
index 0b0d0743d2..66bf649a64 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java
@@ -41,6 +41,7 @@
 import java.util.Base64;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicReference;
 import org.eolang.AtVoid;
@@ -139,9 +140,9 @@ public EOrust(final Phi sigma) {
 
     @Override
     public Phi lambda() throws Exception {
-        final String name = NAMES.get(
-            this.take("code").locator().split(":")[0]
-        );
+        final String locator = this.take("code").locator().split(":")[0];
+        final String name = Optional.ofNullable(NAMES.get(locator))
+            .orElseThrow(() -> new ExNative("No native function for %s", locator));
         final Method method = Class.forName(
             String.format(
                 "EOrust.natives.%s",
diff --git a/eo-runtime/src/test/eo/org/eolang/rust-tests.eo b/eo-runtime/src/test/eo/org/eolang/rust-tests.eo
index 32b159f0f6..482bfccbe9 100644
--- a/eo-runtime/src/test/eo/org/eolang/rust-tests.eo
+++ b/eo-runtime/src/test/eo/org/eolang/rust-tests.eo
@@ -391,3 +391,71 @@
   eq. > @
     applied.content
     "qwerty"
+
+# This is the default 64+ symbols comment in front of named abstract object.
+[] > rust-with-string-fqn
+  Q
+  .org
+  .eolang
+  .rust > r
+    Q
+    .org
+    .eolang
+    .string:0
+      Q
+      .org
+      .eolang
+      .bytes:0
+        75-73-65-20-65-6F-3A-3A-50-6F-72-74-61-6C-3B-0A-75-73-65-20-65-6F-3A-3A-65-6F-5F-65-6E-75-6D-3A-3A-45-4F-3B-0A-75-73-65-20-65-6F-3A-3A-65-6F-5F-65-6E-75-6D-3A-3A-45-4F-3A-3A-7B-45-4F-49-6E-74-7D-3B-0A-0A-70-75-62-20-66-6E-20-66-6F-6F-28-5F-70-6F-72-74-61-6C-3A-20-26-6D-75-74-20-50-6F-72-74-61-6C-29-20-2D-3E-20-4F-70-74-69-6F-6E-3C-45-4F-3E-20-7B-0A-20-20-70-72-69-6E-74-6C-6E-21-28-22-48-65-6C-6C-6F-20-77-6F-72-6C-64-20-66-72-6F-6D-20-72-75-73-74-22-29-3B-0A-20-20-53-6F-6D-65-28-45-4F-49-6E-74-28-32-29-29-0A-7D
+    []:1
+    Q
+    .org
+    .eolang
+    .tuple
+    .empty:2
+  $
+  .r
+  .eq > @
+    Q
+    .org
+    .eolang
+    .int:0
+      Q
+      .org
+      .eolang
+      .bytes:0
+        00-00-00-00-00-00-00-02
+
+# This is the default 64+ symbols comment in front of named abstract object.
+[] > rust-reversed-notation
+  rust. > r
+    eolang.
+      org.
+        Q
+    string.:0
+      eolang.
+        org.
+          Q
+      bytes.:0
+        eolang.
+          org.
+            Q
+        75-73-65-20-65-6F-3A-3A-50-6F-72-74-61-6C-3B-0A-75-73-65-20-65-6F-3A-3A-65-6F-5F-65-6E-75-6D-3A-3A-45-4F-3B-0A-75-73-65-20-65-6F-3A-3A-65-6F-5F-65-6E-75-6D-3A-3A-45-4F-3A-3A-7B-45-4F-49-6E-74-7D-3B-0A-0A-70-75-62-20-66-6E-20-66-6F-6F-28-5F-70-6F-72-74-61-6C-3A-20-26-6D-75-74-20-50-6F-72-74-61-6C-29-20-2D-3E-20-4F-70-74-69-6F-6E-3C-45-4F-3E-20-7B-0A-20-20-70-72-69-6E-74-6C-6E-21-28-22-48-65-6C-6C-6F-20-77-6F-72-6C-64-20-66-72-6F-6D-20-72-75-73-74-22-29-3B-0A-20-20-53-6F-6D-65-28-45-4F-49-6E-74-28-32-29-29-0A-7D
+    []:1
+    empty.:2
+      tuple.
+        eolang.
+          org.
+            Q
+  eq. > @
+    r.
+      $
+    int.:0
+      eolang.
+        org.
+          Q
+      bytes.:0
+        eolang.
+          org.
+            Q
+        00-00-00-00-00-00-00-02