diff --git a/.gitignore b/.gitignore
index c3a04f401..cb5496040 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@ bin/
 .project
 .settings/
 .idea/
+.kotlin/
 **/.DS_Store
 rpgJavaInterpreter-core/generated-src/
 rpgJavaInterpreter-core/src/main/gen/
diff --git a/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/compile_time_interpreter.kt b/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/compile_time_interpreter.kt
index ca38f74de..506fc8656 100644
--- a/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/compile_time_interpreter.kt
+++ b/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/compile_time_interpreter.kt
@@ -286,6 +286,21 @@ open class BaseCompileTimeInterpreter(
         return findType(rContext.getStatements(procedureName), declName, conf, false)!!
     }
 
+    /**
+     * Find type of declaration by specifically look for it in DEFINE statements.
+     */
+    open fun evaluateTypeOfDefine(rContext: RContext, declName: String, conf: ToAstConfiguration, procedureName: String?): Type? {
+        val statements = rContext.getStatements(procedureName)
+        val define = statements
+            .mapNotNull { it.cspec_fixed() }
+            .mapNotNull { it.cspec_fixed_standard() }
+            .mapNotNull { it.csDEFINE() }
+            .map { it.toAst(conf) }
+        val match = define.firstOrNull { it.newVarName.equals(declName, ignoreCase = true) } ?: return null
+
+        return findType(statements, match.originalName, conf)
+    }
+
     private fun findType(statements: List<RpgParser.StatementContext>, declName: String, conf: ToAstConfiguration, innerBlock: Boolean = true): Type? {
         statements
             .forEach { it ->
diff --git a/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/internal_interpreter.kt b/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/internal_interpreter.kt
index 3d89e0f9b..b2387786f 100644
--- a/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/internal_interpreter.kt
+++ b/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/interpreter/internal_interpreter.kt
@@ -1111,7 +1111,6 @@ open class InternalInterpreter(
             is QualifiedAccessExpr -> {
                 when (val container = eval(target.container)) {
                     is DataStructValue -> {
-                        container[target.field.referred!!]
                         container.set(target.field.referred!!, coerce(value, target.field.referred!!.type))
                     }
 
diff --git a/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/parsing/parsetreetoast/data_definitions.kt b/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/parsing/parsetreetoast/data_definitions.kt
index acc03bae0..4d282cb56 100644
--- a/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/parsing/parsetreetoast/data_definitions.kt
+++ b/rpgJavaInterpreter-core/src/main/kotlin/com/smeup/rpgparser/parsing/parsetreetoast/data_definitions.kt
@@ -890,7 +890,6 @@ private fun RpgParser.Parm_fixedContext.toFieldInfo(
     }
 
     if (overlay != null) {
-        this.name
         val pos = overlay.keyword_overlay().pos
         val nameExpr = overlay.keyword_overlay().name
         val targetFieldName = nameExpr.identifier().text
@@ -904,16 +903,16 @@ private fun RpgParser.Parm_fixedContext.toFieldInfo(
     val hasInitValue = this.keyword().find { it.keyword_inz() != null }
     // compileTimeInterpreter.evaluate(this.rContext(), dim!!).asInt().value.toInt(),
     val varName = like?.variable?.name ?: this.name
+    val compileTimeInterpreter = InjectableCompileTimeInterpreter(
+        knownDataDefinitions = knownDataDefinitions.toList(),
+        delegatedCompileTimeInterpreter = conf.compileTimeInterpreter
+    )
     val explicitElementType: Type? = this.calculateExplicitElementType(arraySizeDeclared, conf)
         ?: knownDataDefinitions.firstOrNull { it.name.equals(varName, ignoreCase = true) }?.type
         ?: knownDataDefinitions.flatMap { it.fields }.firstOrNull { fe -> fe.name.equals(varName, ignoreCase = true) }?.type
         ?: fieldsExtname?.firstOrNull { it.name.equals(varName, ignoreCase = true) }?.elementType
-        ?: like?.let {
-            InjectableCompileTimeInterpreter(
-                knownDataDefinitions = knownDataDefinitions.toList(),
-                delegatedCompileTimeInterpreter = conf.compileTimeInterpreter
-            ).evaluateTypeOf(this.rContext(), it, conf)
-        }
+        ?: like?.let { compileTimeInterpreter.evaluateTypeOf(this.rContext(), it, conf) }
+        ?: compileTimeInterpreter.evaluateTypeOfDefine(this.rContext(), varName, conf, null)
 
     if (hasInitValue != null) {
         initializationValue = if (hasInitValue.keyword_inz().simpleExpression() != null) {
diff --git a/rpgJavaInterpreter-core/src/test/kotlin/com/smeup/rpgparser/smeup/MULANGT02ConstAndDSpecTest.kt b/rpgJavaInterpreter-core/src/test/kotlin/com/smeup/rpgparser/smeup/MULANGT02ConstAndDSpecTest.kt
index b3beda60d..f4dfbd806 100644
--- a/rpgJavaInterpreter-core/src/test/kotlin/com/smeup/rpgparser/smeup/MULANGT02ConstAndDSpecTest.kt
+++ b/rpgJavaInterpreter-core/src/test/kotlin/com/smeup/rpgparser/smeup/MULANGT02ConstAndDSpecTest.kt
@@ -783,4 +783,14 @@ open class MULANGT02ConstAndDSpecTest : MULANGTTest() {
         val expected = listOf("ABCFG")
         assertEquals(expected, "smeup/MUDRNRAPU00165".outputOf(configuration = smeupConfig))
     }
+
+    /**
+     * Fields in a DS based on existing definitions
+     * @see #LS24004911
+     */
+    @Test
+    fun executeMUDRNRAPU00270() {
+        val expected = listOf("OK", "OK")
+        assertEquals(expected, "smeup/MUDRNRAPU00270".outputOf(configuration = smeupConfig))
+    }
 }
diff --git a/rpgJavaInterpreter-core/src/test/resources/smeup/MUDRNRAPU00270.rpgle b/rpgJavaInterpreter-core/src/test/resources/smeup/MUDRNRAPU00270.rpgle
new file mode 100644
index 000000000..781b858d0
--- /dev/null
+++ b/rpgJavaInterpreter-core/src/test/resources/smeup/MUDRNRAPU00270.rpgle
@@ -0,0 +1,34 @@
+     V* ==============================================================
+     V* 13/11/2024 APU002 Creation
+     V* ==============================================================
+    O * PROGRAM GOAL
+    O * Define a DS with fields based on existing definitions
+     V* ==============================================================
+    O * JARIKO ANOMALY
+    O * Before the fix, the error was about the CKEY not being resolved
+     V* ==============================================================
+     D CKEY            DS
+     D  §OAVT1
+     D  §OAVP1
+     D  §OAVT2
+     D  §OAVP2
+     D  §OAVAT
+
+     D  £OAVT1         S              2
+     D  £OAVP1         S             10
+     D  £OAVT2         S              2
+     D  £OAVP2         S             10
+     D  £OAVAT         S             15
+
+     C                   EVAL      £OAVT1='OK'
+     C                   EVAL      §OAVT1='OK'
+     C     £OAVT1        DSPLY
+     C     §OAVT1        DSPLY
+
+     C     *LIKE         DEFINE    £OAVT1        §OAVT1
+     C     *LIKE         DEFINE    £OAVP1        §OAVP1
+     C     *LIKE         DEFINE    £OAVT2        §OAVT2
+     C     *LIKE         DEFINE    £OAVP2        §OAVP2
+     C     *LIKE         DEFINE    £OAVAT        §OAVAT
+
+     C                   SETON                                          LR
\ No newline at end of file