diff -r 3ba40be8e484 -r 7ca52d38f8c3 secureswitools/swisistools/source/sisxlibrary/utility_windows.cpp
--- a/secureswitools/swisistools/source/sisxlibrary/utility_windows.cpp	Fri Mar 12 15:43:14 2010 +0200
+++ b/secureswitools/swisistools/source/sisxlibrary/utility_windows.cpp	Mon Mar 15 12:41:05 2010 +0200
@@ -129,7 +129,9 @@
 HANDLE MakeSISOpenFile(LPCWSTR pszFilename, DWORD dwAccessMode, DWORD dwCreateFlags)
 // Open file with Unicode filename correctly under Win95 and WinNT
 	{
-	return CreateFileW(pszFilename, dwAccessMode, 0, NULL, dwCreateFlags, FILE_ATTRIBUTE_NORMAL, NULL);
+	// Opening the file with FILE_SHARE_READ access, so that other processes can access
+	// the package file in parallel( Issue observed in Raptor with parallel builds udeb and urel)
+	return CreateFileW(pszFilename, dwAccessMode, 1, NULL, dwCreateFlags, FILE_ATTRIBUTE_NORMAL, NULL);
 	}
 
 BOOL MakeSISDeleteFile(LPCWSTR pszFilename)