diff --git a/architecture-model-generator/modules/architecture-model-generator-core/src/main/java/io/ballerina/artifactsgenerator/ModuleNodeTransformer.java b/architecture-model-generator/modules/architecture-model-generator-core/src/main/java/io/ballerina/artifactsgenerator/ModuleNodeTransformer.java
index de81fc7dbe..e11f88a63d 100644
--- a/architecture-model-generator/modules/architecture-model-generator-core/src/main/java/io/ballerina/artifactsgenerator/ModuleNodeTransformer.java
+++ b/architecture-model-generator/modules/architecture-model-generator-core/src/main/java/io/ballerina/artifactsgenerator/ModuleNodeTransformer.java
@@ -101,6 +101,8 @@ public Optional<Artifact> transform(FunctionDefinitionNode functionDefinitionNod
                         .name(functionName)
                         .type(Artifact.Type.DATA_MAPPER);
             }
+        } else if (functionDefinitionNode.functionBody().kind() == SyntaxKind.EXTERNAL_FUNCTION_BODY) {
+            return Optional.empty();
         } else if (functionDefinitionNode.kind() == SyntaxKind.RESOURCE_ACCESSOR_DEFINITION) {
             functionBuilder
                     .accessor(functionName)
diff --git a/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/config/functions.json b/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/config/functions.json
index 1c07939884..e722f4c40e 100644
--- a/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/config/functions.json
+++ b/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/config/functions.json
@@ -9,11 +9,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 13,
+            "line": 14,
             "offset": 0
           },
           "endLine": {
-            "line": 15,
+            "line": 16,
             "offset": 1
           }
         },
@@ -27,11 +27,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 25,
+            "line": 26,
             "offset": 0
           },
           "endLine": {
-            "line": 27,
+            "line": 28,
             "offset": 1
           }
         },
@@ -45,11 +45,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 39,
+            "line": 40,
             "offset": 0
           },
           "endLine": {
-            "line": 44,
+            "line": 45,
             "offset": 1
           }
         },
@@ -63,11 +63,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 18,
+            "line": 19,
             "offset": 0
           },
           "endLine": {
-            "line": 22,
+            "line": 23,
             "offset": 1
           }
         },
@@ -81,11 +81,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 47,
+            "line": 48,
             "offset": 0
           },
           "endLine": {
-            "line": 49,
+            "line": 50,
             "offset": 1
           }
         },
@@ -99,11 +99,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 8,
+            "line": 9,
             "offset": 0
           },
           "endLine": {
-            "line": 10,
+            "line": 11,
             "offset": 1
           }
         },
@@ -117,11 +117,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 3,
+            "line": 4,
             "offset": 0
           },
           "endLine": {
-            "line": 5,
+            "line": 6,
             "offset": 1
           }
         },
@@ -135,11 +135,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 30,
+            "line": 31,
             "offset": 0
           },
           "endLine": {
-            "line": 36,
+            "line": 37,
             "offset": 1
           }
         },
@@ -155,11 +155,11 @@
         "location": {
           "fileName": "functions.bal",
           "startLine": {
-            "line": 52,
+            "line": 53,
             "offset": 0
           },
           "endLine": {
-            "line": 71,
+            "line": 72,
             "offset": 1
           }
         },
diff --git a/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/source/functions.bal b/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/source/functions.bal
index df321598ab..39c208ac1a 100644
--- a/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/source/functions.bal
+++ b/architecture-model-generator/modules/architecture-model-generator-ls-extension/src/test/resources/artifacts/source/functions.bal
@@ -1,4 +1,5 @@
 import ballerina/io;
+import ballerina/jballerina.java;
 
 // Basic function with no parameters and no return value
 public function sayHello() {
@@ -70,3 +71,9 @@ public function main() {
         io:println("Error: " + divResult.message());
     }
 }
+
+function execCommand(handle runtime, handle command) returns handle|error = @java:Method {
+    'class: "java.lang.Runtime",
+    name: "exec",
+    paramTypes: ["java.lang.String"]
+} external;