Index: uspace/app/taskdump/elf_core.c
===================================================================
--- uspace/app/taskdump/elf_core.c	(revision c1694b6b243b360b5f1fbf0629b5e7d4f7f4a515)
+++ uspace/app/taskdump/elf_core.c	(revision f43742e2319f2b70763dd51bbc6ef09fd8a86f2e)
@@ -123,8 +123,8 @@
 	}
 
-	fd = vfs_lookup_open(file_name, WALK_REGULAR | WALK_MAY_CREATE,
-	    MODE_WRITE);
-	if (fd < 0) {
-		printf("Failed opening file.\n");
+	rc = vfs_lookup_open(file_name, WALK_REGULAR | WALK_MAY_CREATE,
+	    MODE_WRITE, &fd);
+	if (rc != EOK) {
+		printf("Failed opening file '%s': %s.\n", file_name, str_error(rc));
 		free(p_hdr);
 		return ENOENT;
Index: uspace/app/taskdump/symtab.c
===================================================================
--- uspace/app/taskdump/symtab.c	(revision c1694b6b243b360b5f1fbf0629b5e7d4f7f4a515)
+++ uspace/app/taskdump/symtab.c	(revision f43742e2319f2b70763dd51bbc6ef09fd8a86f2e)
@@ -82,7 +82,7 @@
 		return ENOMEM;
 
-	fd = vfs_lookup_open(file_name, WALK_REGULAR, MODE_READ);
-	if (fd < 0) {
-		printf("failed opening file\n");
+	rc = vfs_lookup_open(file_name, WALK_REGULAR, MODE_READ, &fd);
+	if (rc != EOK) {
+		printf("failed opening file '%s': %s\n", file_name, str_error(rc));
 		free(stab);
 		return ENOENT;