--- nono/vm/human68k.cpp	2026/04/29 17:04:28	1.1
+++ nono/vm/human68k.cpp	2026/04/29 17:04:29	1.1.1.2
@@ -80,13 +80,14 @@ Human68k::Init()
 	// 実行ファイルオープン
 	int file_fd = open(human68k_file, O_RDONLY);
 	if (file_fd == -1) {
-		warn("open %s", human68k_file);
+		warn("Human68k executable \"%s\" open failed", human68k_file);
 		return false;
 	}
 
 	struct stat st;
 	if (fstat(file_fd, &st) != 0) {
-		warn("fstat %s", human68k_file);
+		warn("Human68k executable \"%s\" fstat failed", human68k_file);
+		close(file_fd);
 		return false;
 	}
 	uint32 file_size;
@@ -96,7 +97,8 @@ Human68k::Init()
 	// mmap
 	file = (uint8 *)mmap(NULL, file_size, PROT_READ, MAP_PRIVATE, file_fd, 0);
 	if (file == MAP_FAILED) {
-		warn("mmap");
+		warn("Human68k executable \"%s\" mmap failed", human68k_file);
+		close(file_fd);
 		return false;
 	}
 
@@ -113,12 +115,13 @@ Human68k::Init()
 		} else if (file[0] == 0x60 && file[1] == 0x1a) {
 			r = LoadZ(file, file_size);
 		} else {
-			warnx("Invalid file extension");
+			warnx("Human68k executable \"%s\" cannot identify file type",
+				human68k_file);
 			return false;
 		}
 	}
 	if (!r) {
-		warnx("Invalid file format");
+		warnx("Human68k executable \"%s\" invalid file format", human68k_file);
 		return false;
 	}