diff --git a/CHANGELOG.md b/CHANGELOG.md
index a30a24b1..068825ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ Released on ...
 - Default path "config/config.yaml" now supported (see [#363](https://github.com/JetBrains-Research/snakecharm/issues/363))
 - Access by index to input/output sections with 'multiext' function (see [#278](https://github.com/JetBrains-Research/snakecharm/issues/278))
 - Inspection: Do not show warning that rule section is unused variable if rule is defined in method (see [#385](https://github.com/JetBrains-Research/snakecharm/issues/385))
+- SOE: From UnusedLocal inspection for SnakemakeSL expression  (see [#380](https://github.com/JetBrains-Research/snakecharm/issues/380))
 - TODO  (see [#NNN](https://github.com/JetBrains-Research/snakecharm/issues/NNN))
 
 ### Added
diff --git a/src/main/kotlin/com/jetbrains/snakecharm/inspections/SmkIgnorePyInspectionExtension.kt b/src/main/kotlin/com/jetbrains/snakecharm/inspections/SmkIgnorePyInspectionExtension.kt
index 585eaca7..14a8188b 100644
--- a/src/main/kotlin/com/jetbrains/snakecharm/inspections/SmkIgnorePyInspectionExtension.kt
+++ b/src/main/kotlin/com/jetbrains/snakecharm/inspections/SmkIgnorePyInspectionExtension.kt
@@ -47,9 +47,11 @@ class SmkIgnorePyInspectionExtension : PyInspectionExtension() {
     // ignoreInitNewSignatures
 
     override fun ignoreUnused(local: PsiElement?, evalContext: TypeEvalContext): Boolean {
-        if (local is SmkRuleOrCheckpointArgsSection) {
-            return true
-        }
+        // If inspection is suppressed, SOE: in Parser #380 not happen
+        // temporary turn off suppressing
+//        if (local is SmkRuleOrCheckpointArgsSection) {
+//            return true
+//        }
         return false
     }
 }
diff --git a/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionExpression.kt b/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionExpression.kt
index ccb95f6f..58fd2d20 100644
--- a/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionExpression.kt
+++ b/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionExpression.kt
@@ -2,6 +2,7 @@ package com.jetbrains.snakecharm.stringLanguage.lang.psi
 
 import com.intellij.lang.ASTNode
 import com.jetbrains.python.psi.PyElementVisitor
+import com.jetbrains.python.psi.impl.PyReferenceExpressionImpl
 import com.jetbrains.python.psi.types.PyType
 import com.jetbrains.python.psi.types.TypeEvalContext
 import com.jetbrains.snakecharm.lang.psi.BaseSmkSLReferenceExpression
@@ -10,9 +11,12 @@ import com.jetbrains.snakecharm.stringLanguage.lang.SmkSLElementVisitor
 /**
  * Not reference expression
  */
-class SmkSLSubscriptionExpression(node: ASTNode) : SmkSLElementImpl(node), SmkSLExpression {
+// TODO PySubscriptionExpression
+class SmkSLSubscriptionExpression(node: ASTNode) : PyReferenceExpressionImpl(node), BaseSmkSLReferenceExpression {
     override fun getType(context: TypeEvalContext, key: TypeEvalContext.Key): PyType? = null
 
+//    override fun getNameElement() = node.findChildByType(SmkSLTokenTypes.ACCESS_KEY)
+
     override fun acceptPyVisitor(pyVisitor: PyElementVisitor) = when (pyVisitor) {
         is SmkSLElementVisitor -> pyVisitor.visitSmkSLSubscriptionExpression(this)
         else -> super.acceptPyVisitor(pyVisitor)
diff --git a/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionKeyReferenceExpression.kt b/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionKeyReferenceExpression.kt
index 99b5cebc..97254e97 100644
--- a/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionKeyReferenceExpression.kt
+++ b/src/main/kotlin/com/jetbrains/snakecharm/stringLanguage/lang/psi/SmkSLSubscriptionKeyReferenceExpression.kt
@@ -13,7 +13,7 @@ import com.jetbrains.snakecharm.lang.psi.types.SmkAvailableForSubscriptionType
 import com.jetbrains.snakecharm.stringLanguage.lang.SmkSLElementVisitor
 import com.jetbrains.snakecharm.stringLanguage.lang.parser.SmkSLTokenTypes
 import com.jetbrains.snakecharm.stringLanguage.lang.psi.references.SmkSLSubscriptionKeyReference
-
+// TODO: PySubscriptionExpression
 class SmkSLSubscriptionKeyReferenceExpression(node: ASTNode) : PyReferenceExpressionImpl(node), BaseSmkSLReferenceExpression {
     override fun getName() = referencedName
 
diff --git a/src/test/kotlin/features/glue/OnetimeUsedSteps.kt b/src/test/kotlin/features/glue/OnetimeUsedSteps.kt
new file mode 100644
index 00000000..bb3dc3aa
--- /dev/null
+++ b/src/test/kotlin/features/glue/OnetimeUsedSteps.kt
@@ -0,0 +1,34 @@
+package features.glue
+
+import com.intellij.openapi.application.runReadAction
+import com.jetbrains.python.psi.PyRecursiveElementVisitor
+import com.jetbrains.python.psi.PyReferenceExpression
+import com.jetbrains.snakecharm.stringLanguage.lang.psi.SmkSLSubscriptionKeyReferenceExpression
+import io.cucumber.java.en.When
+
+class OnetimeUsedSteps {
+    @When("^validate issue 380$")
+    fun validateIssue380() {
+        runReadAction {
+            val psiElement = SnakemakeWorld.fixture().elementAtCaret
+            require(psiElement is SmkSLSubscriptionKeyReferenceExpression) {
+                "Actual class: ${psiElement.javaClass.simpleName}"
+            }
+            require(psiElement.text.equals("proportion")) {
+                "Actual text: ${psiElement.text}"
+            }
+            var counter = 0
+            val visitor = object : PyRecursiveElementVisitor() {
+                override fun visitPyReferenceExpression(node: PyReferenceExpression) {
+                    counter++
+                    node.qualifier?.accept(this)
+                }
+            }
+            psiElement.accept(visitor)
+            // Assert no SOE, i.e. stack not deep:
+            assert(counter < 5) {
+                "Actual counter: $counter"
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/test/resources/features/stringLanguage/issue380.feature b/src/test/resources/features/stringLanguage/issue380.feature
new file mode 100644
index 00000000..0a3d863e
--- /dev/null
+++ b/src/test/resources/features/stringLanguage/issue380.feature
@@ -0,0 +1,13 @@
+Feature: SOE, issue 380
+  Scenario: Foo
+    Given a snakemake project
+    Given I open a file "foo.smk" with text
+    """
+    def foo():
+        rule:
+            shell:  "{config[methtool][proportion]}"
+        pass
+    """
+    When I put the caret after propo
+    Then I expect language injection on "{config[methtool][proportion]}"
+    And validate issue 380
\ No newline at end of file