diff --git a/.github/workflows/c-api-test-loading-tokens-hotwords-from-memory.yaml b/.github/workflows/c-api-test-loading-tokens-hotwords-from-memory.yaml
index 810ba1553..6ce4372ba 100644
--- a/.github/workflows/c-api-test-loading-tokens-hotwords-from-memory.yaml
+++ b/.github/workflows/c-api-test-loading-tokens-hotwords-from-memory.yaml
@@ -107,6 +107,8 @@ jobs:
           cp bpe.model sherpa-onnx-streaming-zipformer-en-20M-2023-02-17/
           rm bpe.model
           
+          printf "▁A ▁T ▁P :1.5\n▁A ▁B ▁C :3.0" > hotwords.txt
+
           ls -lh sherpa-onnx-streaming-zipformer-en-20M-2023-02-17
           echo "---"
           ls -lh sherpa-onnx-streaming-zipformer-en-20M-2023-02-17/test_wavs
diff --git a/c-api-examples/streaming-zipformer-buffered-tokens-hotwords-c-api.c b/c-api-examples/streaming-zipformer-buffered-tokens-hotwords-c-api.c
index 05379602f..bd8b1296c 100644
--- a/c-api-examples/streaming-zipformer-buffered-tokens-hotwords-c-api.c
+++ b/c-api-examples/streaming-zipformer-buffered-tokens-hotwords-c-api.c
@@ -76,14 +76,14 @@ int32_t main() {
   // reading tokens and hotwords to buffers
   const *tokens_buf;
   size_t token_buf_size = read_file(tokens_filename, &tokens_buf);
-  if(token_buf_size < 0) {
+  if(token_buf_size < 1) {
     fprintf(stderr, "Please check your tokens.txt!\n");
     free(tokens_buf);
     return -1;
   }
   const *hotwords_buf;
   size_t hotwords_buf_size = read_file(hotwords_filename, &hotwords_buf);
-  if(hotwords_buf_size < 0) {
+  if(hotwords_buf_size < 1) {
     fprintf(stderr, "Please check your hotwords.txt!\n");
     free(hotwords_buf);
     return -1;
@@ -192,510 +192,4 @@ int32_t main() {
   fprintf(stderr, "\n");
 
   return 0;
-}
-
-const char* hotwords_buf = "▁A ▁T ▁P :1.5\n \
-▁A ▁B ▁C :3.0";
-
-const char* tokens_buf = "<blk> 0 \n \
-<sos/eos> 1 \n \
-<unk> 2 \n \
-S 3 \n \
-▁THE 4 \n \
-▁A 5 \n \
-T 6 \n \
-▁AND 7 \n \
-ED 8 \n \
-▁OF 9 \n \
-▁TO 10 \n \
-E 11 \n \
-D 12 \n \
-N 13 \n \
-ING 14 \n \
-▁IN 15 \n \
-Y 16 \n \
-M 17 \n \
-C 18 \n \
-▁I 19 \n \
-A 20 \n \
-P 21 \n \
-▁HE 22 \n \
-R 23 \n \
-O 24 \n \
-L 25 \n \
-RE 26 \n \
-I 27 \n \
-U 28 \n \
-ER 29 \n \
-▁IT 30 \n \
-LY 31 \n \
-▁THAT 32 \n \
-▁WAS 33 \n \
-▁ 34 \n \
-▁S 35 \n \
-AR 36 \n \
-▁BE 37 \n \
-F 38 \n \
-▁C 39 \n \
-IN 40 \n \
-B 41 \n \
-▁FOR 42 \n \
-OR 43 \n \
-LE 44 \n \
-' 45 \n \
-▁HIS 46 \n \
-▁YOU 47 \n \
-AL 48 \n \
-▁RE 49 \n \
-V 50 \n \
-▁B 51 \n \
-G 52 \n \
-RI 53 \n \
-▁E 54 \n \
-▁WITH 55 \n \
-▁T 56 \n \
-▁AS 57 \n \
-LL 58 \n \
-▁P 59 \n \
-▁HER 60 \n \
-ST 61 \n \
-▁HAD 62 \n \
-▁SO 63 \n \
-▁F 64 \n \
-W 65 \n \
-CE 66 \n \
-▁IS 67 \n \
-ND 68 \n \
-▁NOT 69 \n \
-TH 70 \n \
-▁BUT 71 \n \
-EN 72 \n \
-▁SHE 73 \n \
-▁ON 74 \n \
-VE 75 \n \
-ON 76 \n \
-SE 77 \n \
-▁DE 78 \n \
-UR 79 \n \
-▁G 80 \n \
-CH 81 \n \
-K 82 \n \
-TER 83 \n \
-▁AT 84 \n \
-IT 85 \n \
-▁ME 86 \n \
-RO 87 \n \
-NE 88 \n \
-RA 89 \n \
-ES 90 \n \
-IL 91 \n \
-NG 92 \n \
-IC 93 \n \
-▁NO 94 \n \
-▁HIM 95 \n \
-ENT 96 \n \
-IR 97 \n \
-▁WE 98 \n \
-H 99 \n \
-▁DO 100 \n \
-▁ALL 101 \n \
-▁HAVE 102 \n \
-LO 103 \n \
-▁BY 104 \n \
-▁MY 105 \n \
-▁MO 106 \n \
-▁THIS 107 \n \
-LA 108 \n \
-▁ST 109 \n \
-▁WHICH 110 \n \
-▁CON 111 \n \
-▁THEY 112 \n \
-CK 113 \n \
-TE 114 \n \
-▁SAID 115 \n \
-▁FROM 116 \n \
-▁GO 117 \n \
-▁WHO 118 \n \
-▁TH 119 \n \
-▁OR 120 \n \
-▁D 121 \n \
-▁W 122 \n \
-VER 123 \n \
-LI 124 \n \
-▁SE 125 \n \
-▁ONE 126 \n \
-▁CA 127 \n \
-▁AN 128 \n \
-▁LA 129 \n \
-▁WERE 130 \n \
-EL 131 \n \
-▁HA 132 \n \
-▁MAN 133 \n \
-▁FA 134 \n \
-▁EX 135 \n \
-AD 136 \n \
-▁SU 137 \n \
-RY 138 \n \
-▁MI 139 \n \
-AT 140 \n \
-▁BO 141 \n \
-▁WHEN 142 \n \
-AN 143 \n \
-THER 144 \n \
-PP 145 \n \
-ATION 146 \n \
-▁FI 147 \n \
-▁WOULD 148 \n \
-▁PRO 149 \n \
-OW 150 \n \
-ET 151 \n \
-▁O 152 \n \
-▁THERE 153 \n \
-▁HO 154 \n \
-ION 155 \n \
-▁WHAT 156 \n \
-▁FE 157 \n \
-▁PA 158 \n \
-US 159 \n \
-MENT 160 \n \
-▁MA 161 \n \
-UT 162 \n \
-▁OUT 163 \n \
-▁THEIR 164 \n \
-▁IF 165 \n \
-▁LI 166 \n \
-▁K 167 \n \
-▁WILL 168 \n \
-▁ARE 169 \n \
-ID 170 \n \
-▁RO 171 \n \
-DE 172 \n \
-TION 173 \n \
-▁WA 174 \n \
-PE 175 \n \
-▁UP 176 \n \
-▁SP 177 \n \
-▁PO 178 \n \
-IGHT 179 \n \
-▁UN 180 \n \
-RU 181 \n \
-▁LO 182 \n \
-AS 183 \n \
-OL 184 \n \
-▁LE 185 \n \
-▁BEEN 186 \n \
-▁SH 187 \n \
-▁RA 188 \n \
-▁SEE 189 \n \
-KE 190 \n \
-UL 191 \n \
-TED 192 \n \
-▁SA 193 \n \
-UN 194 \n \
-UND 195 \n \
-ANT 196 \n \
-▁NE 197 \n \
-IS 198 \n \
-▁THEM 199 \n \
-CI 200 \n \
-GE 201 \n \
-▁COULD 202 \n \
-▁DIS 203 \n \
-OM 204 \n \
-ISH 205 \n \
-HE 206 \n \
-EST 207 \n \
-▁SOME 208 \n \
-ENCE 209 \n \
-ITY 210 \n \
-IVE 211 \n \
-▁US 212 \n \
-▁MORE 213 \n \
-▁EN 214 \n \
-ARD 215 \n \
-ATE 216 \n \
-▁YOUR 217 \n \
-▁INTO 218 \n \
-▁KNOW 219 \n \
-▁CO 220 \n \
-ANCE 221 \n \
-▁TIME 222 \n \
-▁WI 223 \n \
-▁YE 224 \n \
-AGE 225 \n \
-▁NOW 226 \n \
-TI 227 \n \
-FF 228 \n \
-ABLE 229 \n \
-▁VERY 230 \n \
-▁LIKE 231 \n \
-AM 232 \n \
-HI 233 \n \
-Z 234 \n \
-▁OTHER 235 \n \
-▁THAN 236 \n \
-▁LITTLE 237 \n \
-▁DID 238 \n \
-▁LOOK 239 \n \
-TY 240 \n \
-ERS 241 \n \
-▁CAN 242 \n \
-▁CHA 243 \n \
-▁AR 244 \n \
-X 245 \n \
-FUL 246 \n \
-UGH 247 \n \
-▁BA 248 \n \
-▁DAY 249 \n \
-▁ABOUT 250 \n \
-TEN 251 \n \
-IM 252 \n \
-▁ANY 253 \n \
-▁PRE 254 \n \
-▁OVER 255 \n \
-IES 256 \n \
-NESS 257 \n \
-ME 258 \n \
-BLE 259 \n \
-▁M 260 \n \
-ROW 261 \n \
-▁HAS 262 \n \
-▁GREAT 263 \n \
-▁VI 264 \n \
-TA 265 \n \
-▁AFTER 266 \n \
-PER 267 \n \
-▁AGAIN 268 \n \
-HO 269 \n \
-SH 270 \n \
-▁UPON 271 \n \
-▁DI 272 \n \
-▁HAND 273 \n \
-▁COM 274 \n \
-IST 275 \n \
-TURE 276 \n \
-▁STA 277 \n \
-▁THEN 278 \n \
-▁SHOULD 279 \n \
-▁GA 280 \n \
-OUS 281 \n \
-OUR 282 \n \
-▁WELL 283 \n \
-▁ONLY 284 \n \
-MAN 285 \n \
-▁GOOD 286 \n \
-▁TWO 287 \n \
-▁MAR 288 \n \
-▁SAY 289 \n \
-▁HU 290 \n \
-TING 291 \n \
-▁OUR 292 \n \
-RESS 293 \n \
-▁DOWN 294 \n \
-IOUS 295 \n \
-▁BEFORE 296 \n \
-▁DA 297 \n \
-▁NA 298 \n \
-QUI 299 \n \
-▁MADE 300 \n \
-▁EVERY 301 \n \
-▁OLD 302 \n \
-▁EVEN 303 \n \
-IG 304 \n \
-▁COME 305 \n \
-▁GRA 306 \n \
-▁RI 307 \n \
-▁LONG 308 \n \
-OT 309 \n \
-SIDE 310 \n \
-WARD 311 \n \
-▁FO 312 \n \
-▁WHERE 313 \n \
-MO 314 \n \
-LESS 315 \n \
-▁SC 316 \n \
-▁MUST 317 \n \
-▁NEVER 318 \n \
-▁HOW 319 \n \
-▁CAME 320 \n \
-▁SUCH 321 \n \
-▁RU 322 \n \
-▁TAKE 323 \n \
-▁WO 324 \n \
-▁CAR 325 \n \
-UM 326 \n \
-AK 327 \n \
-▁THINK 328 \n \
-▁MUCH 329 \n \
-▁MISTER 330 \n \
-▁MAY 331 \n \
-▁JO 332 \n \
-▁WAY 333 \n \
-▁COMP 334 \n \
-▁THOUGHT 335 \n \
-▁STO 336 \n \
-▁MEN 337 \n \
-▁BACK 338 \n \
-▁DON 339 \n \
-J 340 \n \
-▁LET 341 \n \
-▁TRA 342 \n \
-▁FIRST 343 \n \
-▁JUST 344 \n \
-▁VA 345 \n \
-▁OWN 346 \n \
-▁PLA 347 \n \
-▁MAKE 348 \n \
-ATED 349 \n \
-▁HIMSELF 350 \n \
-▁WENT 351 \n \
-▁PI 352 \n \
-GG 353 \n \
-RING 354 \n \
-▁DU 355 \n \
-▁MIGHT 356 \n \
-▁PART 357 \n \
-▁GIVE 358 \n \
-▁IMP 359 \n \
-▁BU 360 \n \
-▁PER 361 \n \
-▁PLACE 362 \n \
-▁HOUSE 363 \n \
-▁THROUGH 364 \n \
-IAN 365 \n \
-▁SW 366 \n \
-▁UNDER 367 \n \
-QUE 368 \n \
-▁AWAY 369 \n \
-▁LOVE 370 \n \
-QUA 371 \n \
-▁LIFE 372 \n \
-▁GET 373 \n \
-▁WITHOUT 374 \n \
-▁PASS 375 \n \
-▁TURN 376 \n \
-IGN 377 \n \
-▁HEAD 378 \n \
-▁MOST 379 \n \
-▁THOSE 380 \n \
-▁SHALL 381 \n \
-▁EYES 382 \n \
-▁COL 383 \n \
-▁STILL 384 \n \
-▁NIGHT 385 \n \
-▁NOTHING 386 \n \
-ITION 387 \n \
-HA 388 \n \
-▁TELL 389 \n \
-▁WORK 390 \n \
-▁LAST 391 \n \
-▁NEW 392 \n \
-▁FACE 393 \n \
-▁HI 394 \n \
-▁WORD 395 \n \
-▁FOUND 396 \n \
-▁COUNT 397 \n \
-▁OB 398 \n \
-▁WHILE 399 \n \
-▁SHA 400 \n \
-▁MEAN 401 \n \
-▁SAW 402 \n \
-▁PEOPLE 403 \n \
-▁FRIEND 404 \n \
-▁THREE 405 \n \
-▁ROOM 406 \n \
-▁SAME 407 \n \
-▁THOUGH 408 \n \
-▁RIGHT 409 \n \
-▁CHILD 410 \n \
-▁FATHER 411 \n \
-▁ANOTHER 412 \n \
-▁HEART 413 \n \
-▁WANT 414 \n \
-▁TOOK 415 \n \
-OOK 416 \n \
-▁LIGHT 417 \n \
-▁MISSUS 418 \n \
-▁OPEN 419 \n \
-▁JU 420 \n \
-▁ASKED 421 \n \
-PORT 422 \n \
-▁LEFT 423 \n \
-▁JA 424 \n \
-▁WORLD 425 \n \
-▁HOME 426 \n \
-▁WHY 427 \n \
-▁ALWAYS 428 \n \
-▁ANSWER 429 \n \
-▁SEEMED 430 \n \
-▁SOMETHING 431 \n \
-▁GIRL 432 \n \
-▁BECAUSE 433 \n \
-▁NAME 434 \n \
-▁TOLD 435 \n \
-▁NI 436 \n \
-▁HIGH 437 \n \
-IZE 438 \n \
-▁WOMAN 439 \n \
-▁FOLLOW 440 \n \
-▁RETURN 441 \n \
-▁KNEW 442 \n \
-▁EACH 443 \n \
-▁KIND 444 \n \
-▁JE 445 \n \
-▁ACT 446 \n \
-▁LU 447 \n \
-▁CERTAIN 448 \n \
-▁YEARS 449 \n \
-▁QUITE 450 \n \
-▁APPEAR 451 \n \
-▁BETTER 452 \n \
-▁HALF 453 \n \
-▁PRESENT 454 \n \
-▁PRINCE 455 \n \
-SHIP 456 \n \
-▁ALSO 457 \n \
-▁BEGAN 458 \n \
-▁HAVING 459 \n \
-▁ENOUGH 460 \n \
-▁PERSON 461 \n \
-▁LADY 462 \n \
-▁WHITE 463 \n \
-▁COURSE 464 \n \
-▁VOICE 465 \n \
-▁SPEAK 466 \n \
-▁POWER 467 \n \
-▁MORNING 468 \n \
-▁BETWEEN 469 \n \
-▁AMONG 470 \n \
-▁KEEP 471 \n \
-▁WALK 472 \n \
-▁MATTER 473 \n \
-▁TEA 474 \n \
-▁BELIEVE 475 \n \
-▁SMALL 476 \n \
-▁TALK 477 \n \
-▁FELT 478 \n \
-▁HORSE 479 \n \
-▁MYSELF 480 \n \
-▁SIX 481 \n \
-▁HOWEVER 482 \n \
-▁FULL 483 \n \
-▁HERSELF 484 \n \
-▁POINT 485 \n \
-▁STOOD 486 \n \
-▁HUNDRED 487 \n \
-▁ALMOST 488 \n \
-▁SINCE 489 \n \
-▁LARGE 490 \n \
-▁LEAVE 491 \n \
-▁PERHAPS 492 \n \
-▁DARK 493 \n \
-▁SUDDEN 494 \n \
-▁REPLIED 495 \n \
-▁ANYTHING 496 \n \
-▁WONDER 497 \n \
-▁UNTIL 498 \n \
-Q 499 \n \
-#0 500 \n \
-#1 501";
\ No newline at end of file
+}
\ No newline at end of file