diff --git a/src/siadrive_dokan_api/siadokandrive.cpp b/src/siadrive_dokan_api/siadokandrive.cpp
index 3a8030d..a01468c 100644
--- a/src/siadrive_dokan_api/siadokandrive.cpp
+++ b/src/siadrive_dokan_api/siadokandrive.cpp
@@ -635,12 +635,13 @@ private:
 		NTSTATUS ret = STATUS_SUCCESS;
 
     auto siaFileTree = GetFileTree();
-    auto siaFile = siaFileTree ? siaFileTree->GetFile(openFileInfo->SiaPath) : nullptr;
+    auto siaFile = siaFileTree && openFileInfo ? siaFileTree->GetFile(openFileInfo->SiaPath) : nullptr;
+    SString cachFileLocation = openFileInfo ? openFileInfo->CacheFilePath : FilePath(GetCacheLocation(), fileName);
 
-    HANDLE tempHandle = openFileInfo->FileHandle;
+    HANDLE tempHandle = openFileInfo ? openFileInfo->FileHandle : nullptr;
 	  if (!siaFile && (!tempHandle || (tempHandle == INVALID_HANDLE_VALUE)))
 		{
-      tempHandle = ::CreateFile(&openFileInfo->CacheFilePath[0], GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, nullptr);
+      tempHandle = ::CreateFile(&cachFileLocation[0], GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, nullptr);
 			if (tempHandle == INVALID_HANDLE_VALUE)
 			{
 				ret = DokanNtStatusFromWin32(::GetLastError());
@@ -653,7 +654,7 @@ private:
 
 		if (ret == STATUS_SUCCESS)
 		{
-      if (openFileInfo->Dummy)
+      if (openFileInfo && openFileInfo->Dummy)
       {
         LARGE_INTEGER li = { 0 };
         li.QuadPart = siaFile->GetFileSize();
@@ -668,12 +669,12 @@ private:
 				// in this case, FindFirstFile can't get directory information
 				if (wcscmp(fileName, L"\\") == 0)
 				{
-					handleFileInfo->dwFileAttributes = ::GetFileAttributes(&openFileInfo->CacheFilePath[0]);
+					handleFileInfo->dwFileAttributes = ::GetFileAttributes(&cachFileLocation[0]);
 				}
 				else
 				{
 					WIN32_FIND_DATA find = { 0 };
-					HANDLE findHandle = ::FindFirstFile(&openFileInfo->CacheFilePath[0], &find);
+					HANDLE findHandle = ::FindFirstFile(&cachFileLocation[0], &find);
 					if (findHandle == INVALID_HANDLE_VALUE)
 					{
             DWORD error = ::GetLastError();