Index: trunk/src/libcschem/hierarchy.c
===================================================================
--- trunk/src/libcschem/hierarchy.c	(revision 10251)
+++ trunk/src/libcschem/hierarchy.c	(revision 10252)
@@ -163,7 +163,7 @@
 csch_sheet_t *csch_hier_find_by_path(const csch_sheet_t *sheet, const char *path, int add_to_prj_as_aux)
 {
 	csch_project_t *prj = (csch_project_t *)sheet->hidlib.project;
-	csch_sheet_t *res;
+	csch_sheet_t *res = NULL;
 	char *dirname, *new_path, *nr_path;
 	long n;
 
@@ -175,6 +175,12 @@
 	new_path = rnd_concat(dirname, "/", path, NULL);
 	free(dirname);
 	nr_path = rnd_lrealpath(new_path);
+
+	if (nr_path == NULL) {
+		rnd_message(RND_MSG_ERROR, "Hirearchic: sheet with path '%s' not found on the file system...\n", new_path);
+		free(new_path);
+		goto done;
+	}
 	free(new_path);
 
 	/* search in project first */