diff --git a/src/input/SimModSuite.h b/src/input/SimModSuite.h
index e74907a..b6e5fb3 100644
--- a/src/input/SimModSuite.h
+++ b/src/input/SimModSuite.h
@@ -461,6 +461,7 @@ class SimModSuite : public FullStorageMeshData {
     AttCase_associate(meshCaseFile, nullptr);
     MS_processSimModelerMeshingAtts(meshCaseFile, meshCase, &meshingOptions);
     AttCase_setModel(meshCase, m_model);
+    AttCase_unassociate(meshCaseFile);
 
     analysisCase = extractCase(attMngr, analysisCaseName);
     pPList children = AttNode_children(analysisCase);
diff --git a/src/input/SimModSuiteApf.h b/src/input/SimModSuiteApf.h
index 88ed5f2..74acf82 100644
--- a/src/input/SimModSuiteApf.h
+++ b/src/input/SimModSuiteApf.h
@@ -341,6 +341,7 @@ class SimModSuiteApf : public ApfMeshInput {
     AttCase_associate(meshCaseFile, nullptr);
     MS_processSimModelerMeshingAtts(meshCaseFile, meshCase, &meshingOptions);
     AttCase_setModel(meshCase, m_model);
+    AttCase_unassociate(meshCaseFile);
 
     analysisCase = extractCase(attMngr, analysisCaseName);
     pPList children = AttNode_children(analysisCase);