Index: trunk/src/io/c_file_system.cc
===================================================================
--- trunk/src/io/c_file_system.cc	(revision 125)
+++ trunk/src/io/c_file_system.cc	(revision 126)
@@ -32,5 +32,5 @@
 stream* c_file_system::open( const char* fpath, const char* fmode /*= "rb" */ )
 {
-	NV_ASSERT( fpath != nullptr && fpath != "" && fmode != nullptr );
+	NV_ASSERT( fpath != nullptr && fpath != "" && fmode != nullptr, "Bad parameters passed to open" );
 	FILE* file = ::fopen( fpath, fmode );
 	if ( !file )