Index: ps/trunk/source/lib/file/file_system.h
===================================================================
--- ps/trunk/source/lib/file/file_system.h
+++ ps/trunk/source/lib/file/file_system.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2020 Wildfire Games.
+/* Copyright (C) 2021 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -88,4 +88,6 @@
 
 LIB_API Status CopyFile(const OsPath& path, const OsPath& newPath, bool override_if_exists = false);
 
+LIB_API Status RenameFile(const OsPath& path, const OsPath& newPath);
+
 #endif	// #ifndef INCLUDED_FILE_SYSTEM
Index: ps/trunk/source/lib/file/file_system.cpp
===================================================================
--- ps/trunk/source/lib/file/file_system.cpp
+++ ps/trunk/source/lib/file/file_system.cpp
@@ -193,6 +193,24 @@
 	return INFO::OK;
 }
 
+Status RenameFile(const OsPath& path, const OsPath& newPath)
+{
+	if (path.empty())
+		return INFO::OK;
+
+	try
+	{
+		fs::rename(path.string8(), newPath.string8());
+	}
+	catch (fs::filesystem_error& err)
+	{
+		debug_printf("RenameFile: failed to rename %s to %s.\n%s\n", path.string8().c_str(), path.string8().c_str(), err.what());
+		return ERR::EXCEPTION;
+	}
+
+	return INFO::OK;
+
+}
 
 Status CopyFile(const OsPath& path, const OsPath& newPath, bool override_if_exists/* = false*/)
 {
Index: ps/trunk/source/main.cpp
===================================================================
--- ps/trunk/source/main.cpp
+++ ps/trunk/source/main.cpp
@@ -665,7 +665,11 @@
 
 			// Install the mods without deleting the pyromod files
 			for (const OsPath& modPath : modsToInstall)
-				installer.Install(modPath, g_ScriptContext, true);
+			{
+				CModInstaller::ModInstallationResult result = installer.Install(modPath, g_ScriptContext, true);
+				if (result != CModInstaller::ModInstallationResult::SUCCESS)
+					LOGERROR("Failed to install '%s'", modPath.string8().c_str());
+			}
 
 			installedMods = installer.GetInstalledMods();
 
Index: ps/trunk/source/ps/ModInstaller.h
===================================================================
--- ps/trunk/source/ps/ModInstaller.h
+++ ps/trunk/source/ps/ModInstaller.h
@@ -39,7 +39,8 @@
 		FAIL_ON_PARSE_JSON,
 		FAIL_ON_EXTRACT_NAME,
 		FAIL_ON_MOD_MOVE,
-		FAIL_ON_JSON_WRITE
+		FAIL_ON_JSON_WRITE,
+		FAIL_ON_MOD_COPY
 	};
 
 	/**
Index: ps/trunk/source/ps/ModInstaller.cpp
===================================================================
--- ps/trunk/source/ps/ModInstaller.cpp
+++ ps/trunk/source/ps/ModInstaller.cpp
@@ -49,9 +49,18 @@
 	CreateDirectories(modTemp.Parent(), 0700);
 
 	if (keepFile)
-		CopyFile(mod, modTemp, true);
-	else
-		wrename(mod, modTemp);
+	{
+		if (CopyFile(mod, modTemp, true) != INFO::OK)
+		{
+			LOGERROR("Failed to copy '%s' to '%s'", mod.string8().c_str(), modTemp.string8().c_str());
+			return FAIL_ON_MOD_COPY;
+		}
+	}
+	else if (RenameFile(mod, modTemp) != INFO::OK)
+	{
+		LOGERROR("Failed to rename '%s' into '%s'", mod.string8().c_str(), modTemp.string8().c_str());
+		return FAIL_ON_MOD_MOVE;
+	}
 
 	// Load the mod to VFS
 	if (m_VFS->Mount(m_CacheDir, m_TempDir / "") != INFO::OK)
@@ -88,8 +97,12 @@
 	//     mod-name.zip
 	//     mod.json
 	CreateDirectories(modDir, 0700);
-	if (wrename(modTemp, modPath) != 0)
+	if (RenameFile(modTemp, modPath) != INFO::OK)
+	{
+		LOGERROR("Failed to rename '%s' into '%s'", modTemp.string8().c_str(), modPath.string8().c_str());
 		return FAIL_ON_MOD_MOVE;
+	}
+
 	DeleteDirectory(modTemp.Parent());
 
 	std::ofstream mod_json((modDir / "mod.json").string8());
Index: ps/trunk/source/ps/ModIo.cpp
===================================================================
--- ps/trunk/source/ps/ModIo.cpp
+++ ps/trunk/source/ps/ModIo.cpp
@@ -485,7 +485,9 @@
 		{
 			Paths paths(g_CmdLineArgs);
 			CModInstaller installer(paths.UserData() / "mods", paths.Cache());
-			installer.Install(m_DownloadFilePath, g_ScriptContext, false);
+			CModInstaller::ModInstallationResult result = installer.Install(m_DownloadFilePath, g_ScriptContext, false);
+			if (result != CModInstaller::ModInstallationResult::SUCCESS)
+				LOGERROR("Failed to install '%s'", m_DownloadFilePath.string8().c_str());
 			g_Mods.UpdateAvailableMods(scriptInterface);
 		}
 		break;