diff --git a/modules/Gpx/Gpx.c b/modules/Gpx/Gpx.c
index 3506518..f2dfd62 100644
--- a/modules/Gpx/Gpx.c
+++ b/modules/Gpx/Gpx.c
@@ -65,7 +65,7 @@ static int find_null_surface() {
 		if (suf[i] == NULL) return i;
 	}
 	
-	SYSERROR("no free surface\n");
+	SYSERROR("no free surface");
 	return 0;
 }
 
diff --git a/src/cali.c b/src/cali.c
index 500e999..6312ecb 100644
--- a/src/cali.c
+++ b/src/cali.c
@@ -68,7 +68,7 @@ static int *getVar(int c0) {
 	} else if (c1 >= 0x40) {
 		return v_ref(c1);  // 0x40 - 0xff
 	}
-	SYSERROR("Invalid variable reference at %d:0x%x\n", sl_getPage(), sl_getIndex() - 2);
+	SYSERROR("Invalid variable reference at %d:0x%x", sl_getPage(), sl_getIndex() - 2);
 	return NULL;
 }
 
@@ -76,7 +76,7 @@ static int *getVar(int c0) {
 int *getCaliVariable() {
 	int *c0 = getVar(sl_getc());
 	if (sl_getc() != 0x7f) {
-		SYSERROR("Something is Wrong @ %03d:%05x\n", sl_getPage(), sl_getIndex());
+		SYSERROR("Something is Wrong @ %03d:%05x", sl_getPage(), sl_getIndex());
 	}
 	return c0;
 }
@@ -125,7 +125,7 @@ int getCaliValue() {
 					cali++;
 					continue;
 				} else if (c1 < 0x34) {
-					SYSERROR("Unknow Parameter @ %03d:%05x\n", sl_getPage(), sl_getIndex());
+					SYSERROR("Unknow Parameter @ %03d:%05x", sl_getPage(), sl_getIndex());
 				}
 			}
 		l_var:
@@ -216,7 +216,7 @@ int getCaliValue() {
 					c1 = sl_getc();
 					if (c0 == 0) { /* 34h-ffh */
 						if (c1 <= 0x33) {
-							SYSERROR("Unknown Parameter @ %03d:%05x\n", sl_getPage(), sl_getIndex());
+							SYSERROR("Unknown Parameter @ %03d:%05x", sl_getPage(), sl_getIndex());
 						}
 					} else { /* 100h- 3fff */
 						c1 += ((c0 & 0x3f) * 256);
diff --git a/src/cmd2F.c b/src/cmd2F.c
index 1321937..8736a1c 100644
--- a/src/cmd2F.c
+++ b/src/cmd2F.c
@@ -1329,9 +1329,9 @@ void commands2F7B() {
 void commands2F7C() {
 	if (!nact->files.ain) {
 		if (nact->files.gr_fname) {
-			SYSERROR("System39.ain is needed to run this game. Make sure you have an \"Ain\" line in %s.\n", nact->files.gr_fname);
+			sys_error("System39.ain is needed to run this game. Make sure you have an \"Ain\" line in %s.", nact->files.gr_fname);
 		} else {
-			SYSERROR("Ain file is needed to run this game. Make sure you have System39.ain file in the game directory.\n");
+			sys_error("Ain file is needed to run this game. Make sure you have System39.ain file in the game directory.");
 		}
 	}
 
diff --git a/src/cmd2F60.c b/src/cmd2F60.c
index be366bb..85a7552 100644
--- a/src/cmd2F60.c
+++ b/src/cmd2F60.c
@@ -43,7 +43,7 @@ void commands2F60() {
 	int fnum = sl_getdw();  /* function number */
 
 	if (dll == NULL) {
-		SYSERROR("No DLL initilized\n");
+		SYSERROR("No DLL initilized");
 	}
 
 	if (dll + type == NULL) goto eexit;
@@ -56,5 +56,5 @@ void commands2F60() {
 	return;
 	
  eexit:
-	SYSERROR("Can't continue further scenario.(%d,%d)(%s,%s)\n", type, fnum, dll[type].name, dll[type].function[fnum].name);
+	SYSERROR("Can't continue further scenario.(%d,%d)(%s,%s)", type, fnum, dll[type].name, dll[type].function[fnum].name);
 }
diff --git a/src/cmd_check.c b/src/cmd_check.c
index 8dbb583..8a71749 100644
--- a/src/cmd_check.c
+++ b/src/cmd_check.c
@@ -145,7 +145,7 @@ static void loopStart() {
 }
 
 static void undeferr() {
-	SYSERROR("Undefined Command:@ %03d,%05x\n", sl_getPage(), sl_getIndex());
+	SYSERROR("Undefined Command:@ %03d,%05x", sl_getPage(), sl_getIndex());
 }
 
 static void message(int c0) {
diff --git a/src/cmds.c b/src/cmds.c
index 6007ad3..ac4637b 100644
--- a/src/cmds.c
+++ b/src/cmds.c
@@ -218,7 +218,7 @@ void commandSG() {
 		break;
 	}
 	default:
-		SYSERROR("Unknown SG command %d\n", sw);
+		SYSERROR("Unknown SG command %d", sw);
 		break;
 	}
 }
@@ -377,6 +377,6 @@ void commandSX() {
 		break;
 	}
 	default:
-		SYSERROR("Unknown SX command\n");
+		SYSERROR("Unknown SX command");
 	}
 }
diff --git a/src/dri.c b/src/dri.c
index 3818ea2..7c12421 100644
--- a/src/dri.c
+++ b/src/dri.c
@@ -174,11 +174,11 @@ drifiles *dri_init(const char **file, int cnt, boolean use_mmap) {
 		if (file[i] == NULL) continue;
 		/* open check */
 		if (NULL == (fp = fopen(file[i], "rb"))) {
-			SYSERROR("File %s is not found\n", file[i]);
+			SYSERROR("File %s is not found", file[i]);
 		}
 		/* check is drifile or noe */
 		if (!filecheck(fp)) {
-			SYSERROR("File %s is not dri file\n", file[i]);
+			SYSERROR("File %s is not dri file", file[i]);
 		}
 		/* get file map */
 		if (!gotmap) {
diff --git a/src/font.c b/src/font.c
index db9cc4f..6241f45 100644
--- a/src/font.c
+++ b/src/font.c
@@ -91,7 +91,7 @@ void font_select(int type, int size) {
 		}
 #endif
 		if (!fs)
-			SYSERROR("Cannot open font %s\n", this.name[type]);
+			SYSERROR("Cannot open font %s", this.name[type]);
 		
 		font_insert(size, type, fs);
 		fontset = &fonttbl[fontcnt - 1];
@@ -202,7 +202,7 @@ void font_init(void) {
 	this.antialiase_on = FALSE;
 	
 	if (TTF_Init() == -1)
-		SYSERROR("Failed to intialize SDL_ttf: %s\n", TTF_GetError());
+		SYSERROR("Failed to intialize SDL_ttf: %s", TTF_GetError());
 }
 
 void font_set_name_and_index(int type, const char *name, int index) {
diff --git a/src/gameresource.c b/src/gameresource.c
index da9e92f..b267f63 100644
--- a/src/gameresource.c
+++ b/src/gameresource.c
@@ -197,7 +197,7 @@ static boolean initGameResourceFromFile(GameResource *gr, FILE *fp, const char *
 	return TRUE;
 
  errexit:
-	SYSERROR("Illigal resource at line(%d) file<%s>\n", linecnt, gr_fname);
+	SYSERROR("Illigal resource at line(%d) file<%s>", linecnt, gr_fname);
 	return FALSE;
 }
 
@@ -214,6 +214,6 @@ boolean initGameResource(GameResource *gr, const char *gr_fname) {
 		closedir(dir);
 		return result;
 	}
-	SYSERROR("Game Resource File open failed\n");
+	SYSERROR("Game Resource File open failed");
 	return FALSE;
 }
diff --git a/src/scenario.c b/src/scenario.c
index fa87bf6..805bcac 100644
--- a/src/scenario.c
+++ b/src/scenario.c
@@ -114,7 +114,7 @@ static int* sl_pop(void) {
 		*tmp++ = *--stack_top;
 	}
 	if (stack_top < stack_buf) {
-		SYSERROR("Stack buffer is illegal\n");
+		SYSERROR("Stack buffer is illegal");
 	}
 	
 	return _tmp;
@@ -235,11 +235,11 @@ void sl_retNear(void) {
 	
 	while (*tmp != STACK_NEARJMP) {
 		if (*tmp == STACK_FARJMP) {
-			SYSERROR("Stack buffer is illegal\n");
+			SYSERROR("Stack buffer is illegal");
 		} else if (*tmp == STACK_VARIABLE) {
 			popVars(tmp);
 		} else {
-			SYSERROR("Stack buffer is illegal\n");
+			SYSERROR("Stack buffer is illegal");
 		}
 		free(tmp);
 		tmp = sl_pop();
@@ -294,7 +294,7 @@ void sl_retFar(void) {
 		} else if (*tmp == STACK_VARIABLE) {
 			popVars(tmp);
 		} else {
-			SYSERROR("Stack buffer is illegal\n");
+			SYSERROR("Stack buffer is illegal");
 		}
 		free(tmp);
 		tmp = sl_pop();
@@ -321,7 +321,7 @@ void sl_retFar2(void) {
 		} else if (*tmp == STACK_VARIABLE) {
 			popVars(tmp);
 		} else {
-			SYSERROR("Stack buffer is illegal\n");
+			SYSERROR("Stack buffer is illegal");
 		}
 		free(tmp);
 		tmp = sl_pop();
@@ -358,7 +358,7 @@ void sl_stackClear_pageCall(int cnt) {
 		} else if (*tmp == STACK_VARIABLE) {
 			popVars(tmp);
 		} else {
-			SYSERROR("Stack buffer is illegal\n");
+			SYSERROR("Stack buffer is illegal");
 		}
 		free(tmp);
 	}
@@ -379,7 +379,7 @@ void sl_stackClear_labelCall(int cnt) {
 		} else if (*tmp == STACK_VARIABLE) {
 			popVars(tmp);
 		} else {
-			SYSERROR("Stack buffer is illegal\n");
+			SYSERROR("Stack buffer is illegal");
 		}
 		free(tmp);
 		if (labelCallCnt_afterPageCall == 0) break;
@@ -408,7 +408,7 @@ void sl_popVar(int *topvar, int cnt) {
 	int *tmp = sl_pop();
 
 	if (*tmp != STACK_VARIABLE) {
-		SYSERROR("Stack buffer is illegal\n");
+		SYSERROR("Stack buffer is illegal");
 	}
 	if (*(tmp + 2) != preVarPage){
 		WARNING("Variable is not match with stacked variable\n");
@@ -476,7 +476,7 @@ void sl_popData(int *data, int cnt) {
 	dataPushCnt--;
 	
 	if (*tmp != STACK_DATA)
-		SYSERROR("Stack buffer is illegal\n");
+		SYSERROR("Stack buffer is illegal");
 	if (*(tmp + 1) != cnt)
 		WARNING("Variable count is not match with stacked variable\n");
 	
@@ -534,7 +534,7 @@ void sl_returnGoto(int address) {
 			popVars(tmp);
 		} else {
 			fprintf(stderr, "%d \n", *tmp);
-			SYSERROR("Stack buffer is illegal\n");
+			SYSERROR("Stack buffer is illegal");
 		}
 		free(tmp);
 		tmp = sl_pop();
diff --git a/src/xsystem35.c b/src/xsystem35.c
index 535a5ee..bb7f211 100644
--- a/src/xsystem35.c
+++ b/src/xsystem35.c
@@ -191,15 +191,14 @@ void sys_message(int lv, char *format, ...) {
 }
 
 void sys_error(char *format, ...) {
+	char buf[512];
 	va_list args;
 	
 	va_start(args, format);
-#ifdef __ANDROID__
-	__android_log_vprint(ANDROID_LOG_FATAL, "xsystem35", format, args);
-#else
-	vfprintf(stderr, format, args);
-#endif
+	vsnprintf(buf, sizeof buf, format, args);
 	va_end(args);
+	SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "xsystem35", buf, NULL);
+
 	sys35_remove();
 	exit(1);
 }
@@ -459,7 +458,7 @@ static void init_signalhandler() {
 
 static void registerGameFiles(void) {
 	if (nact->files.cnt[DRIFILE_SCO] == 0)
-		SYSERROR("No Scenario data available\n");
+		SYSERROR("No Scenario data available");
 	for (int type = 0; type < DRIFILETYPEMAX; type++) {
 		boolean use_mmap = true;
 		if (debugger_mode != DEBUGGER_DISABLED && type == DRIFILE_SCO) {