diff --git a/DXFeedFramework/Native/Events/Markets/TradeETHMapper.swift b/DXFeedFramework/Native/Events/Markets/TradeETHMapper.swift
index 28a253912..00f8f6c73 100644
--- a/DXFeedFramework/Native/Events/Markets/TradeETHMapper.swift
+++ b/DXFeedFramework/Native/Events/Markets/TradeETHMapper.swift
@@ -42,4 +42,3 @@ class TradeETHMapper: Mapper {
         return eventType
     }
 }
-
diff --git a/DXFeedFramework/Native/Ipf/NativeInstrumentProfileReader.swift b/DXFeedFramework/Native/Ipf/NativeInstrumentProfileReader.swift
index 477ebe56c..41abf18d5 100644
--- a/DXFeedFramework/Native/Ipf/NativeInstrumentProfileReader.swift
+++ b/DXFeedFramework/Native/Ipf/NativeInstrumentProfileReader.swift
@@ -85,6 +85,9 @@ class NativeInstrumentProfileReader {
                                                         address.toCStringRef())) else {
             return address
         }
+        defer {
+            _ = try? ErrorCheck.nativeCall(thread, dxfg_String_release(thread, result))
+        }
         return String(pointee: result)
     }
 
diff --git a/DXFeedFramework/Native/Property/NativeProperty.swift b/DXFeedFramework/Native/Property/NativeProperty.swift
index a2672391a..066f453ea 100644
--- a/DXFeedFramework/Native/Property/NativeProperty.swift
+++ b/DXFeedFramework/Native/Property/NativeProperty.swift
@@ -24,14 +24,15 @@ class NativeProperty {
 
     static func getProperty(_ key: String) -> String? {
         let thread = currentThread()
-        let property = dxfg_system_get_property(thread,
-                                                key.cString(using: .utf8))
-        if let property = property {
-            let result = String(utf8String: property)
-            dxfg_system_release_property(thread, property)
-            return result
-        } else {
-            return nil
+        if let property = try? ErrorCheck.nativeCall(thread,
+                                                     dxfg_system_get_property(
+                                                        thread,
+                                                        key.cString(using: .utf8))) {
+            defer {
+                _ = try? ErrorCheck.nativeCall(thread, dxfg_system_release_property(thread, property))
+            }
+            return String(pointee: property)
         }
+        return nil
     }
 }
diff --git a/DXFeedFrameworkTests/IPFTests.swift b/DXFeedFrameworkTests/IPFTests.swift
index 4138b2fdd..c3a7e32ea 100644
--- a/DXFeedFrameworkTests/IPFTests.swift
+++ b/DXFeedFrameworkTests/IPFTests.swift
@@ -265,4 +265,10 @@ STOCK,EREGL:TR,EREĞLİ DEMİR VE ÇELİK FABRİKALARI1 T.A.Ş.,TR,XIST,XIST,TRY
         let result = try collector.createOnFixedThreadPool(numberOfThreads: 15, nameOfthread: "test_ios_thread")
         XCTAssert(result, "createOnFixedThreadPool failed")
     }
+
+    func testResolveSourceURL() throws {
+        let inputStr = "abcde"
+        let resultstr = DXInstrumentProfileReader.resolveSourceURL(address: inputStr)
+        XCTAssert(inputStr == resultstr)
+    }
 }