--- a/core/com.nokia.carbide.cpp.sdk.core/src/com/nokia/carbide/cpp/internal/api/sdk/SymbianBuildContextDataCache.java	Wed Jul 21 12:11:48 2010 -0500
+++ b/core/com.nokia.carbide.cpp.sdk.core/src/com/nokia/carbide/cpp/internal/api/sdk/SymbianBuildContextDataCache.java	Wed Jul 21 13:52:53 2010 -0500
@@ -462,7 +462,7 @@
 				prefix = varVarHRH.toFile();
 			} 
 		}
-		if (prefix != null) {
+		if (prefix != null && prefix.getParentFile() != null) {
 			systemIncludes.add(prefix.getParentFile());
 		}