DrKLO/Telegram · error

Too many tables in file

Error message

Too many tables in file %s

What it means

read_quant_tables reads quantization tables from a text file where each table has exactly 64 values (DCTSIZE2 = 64). The file may contain up to NUM_QUANT_TBLS tables (typically 4). If more tables are found (tblno exceeds NUM_QUANT_TBLS), the function reports an error, closes the file, and returns FALSE. This prevents writing past the available quantization table slots.

Solutions

1. Reduce the number of tables in the file to at most NUM_QUANT_TBLS (typically 4). Each table is 64 comma/space-separated integers.
2. Remove extra tables from the file and keep only the ones you need (typically 0 for luminance, 1 for chrominance).
3. Inspect the file and count the number of 64-value blocks to identify which to remove.

Example fix

# before (5 tables of 64 values each in file.qtl)
cjpeg -qtables file.qtl image.bmp > out.jpg
# after (keep only 4 tables, remove the 5th block)
cjpeg -qtables trimmed.qtl image.bmp > out.jpg

// Pre-validate table count: count 64-value blocks in the file
#include <stdio.h>
static int count_quant_tables(const char *filename) {
  FILE *fp = fopen(filename, "r");
  if (!fp) return -1;
  long val; int termchar, count = 0, vals = 0;
  while (read_text_integer(fp, &val, &termchar)) {
    vals++;
    if (vals % 64 == 0) count++;
  }
  fclose(fp);
  return count;
}

When it happens

Trigger: Providing a quantization table file that contains 5 or more sets of 64 values. Each set of 64 integers counts as one table, and the tblno counter increments past NUM_QUANT_TBLS (typically 4).

Common situations: Concatenating multiple table files without removing extras; misunderstanding the table format and providing too many 64-value groups; generated table files that include more tables than the JPEG standard supports.

Related errors

• Invalid table data in file
• JPEG quantization tables are numbered 0..
• Non-numeric data in file
• Can't open table file
• Invalid scan entry format in file

AI-assisted analysis of DrKLO/Telegram@45ab8f4308 (2026-08-14). Data as JSON: /api/errors/518824d8a55ceb69. Report an issue: GitHub.

Appendix: source

Thrown at TMessagesProj/jni/mozjpeg/rdswitch.c:105

 * NOTE: does not affect the qslots mapping, which will default to selecting
 * table 0 for luminance (or primary) components, 1 for chrominance components.
 * You must use -qslots if you want a different component->table mapping.
 */
{
  FILE *fp;
  int tblno, i, termchar;
  long val;
  unsigned int table[DCTSIZE2];

  if ((fp = fopen(filename, "r")) == NULL) {
    fprintf(stderr, "Can't open table file %s\n", filename);
    return FALSE;
  }
  tblno = 0;

  while (read_text_integer(fp, &val, &termchar)) { /* read 1st element of table */
    if (tblno >= NUM_QUANT_TBLS) {
      fprintf(stderr, "Too many tables in file %s\n", filename);
      fclose(fp);
      return FALSE;
    }
    table[0] = (unsigned int) val;
    for (i = 1; i < DCTSIZE2; i++) {
      if (! read_text_integer(fp, &val, &termchar)) {
        fprintf(stderr, "Invalid table data in file %s\n", filename);
        fclose(fp);
        return FALSE;
      }
      table[i] = (unsigned int) val;
    }
#if JPEG_LIB_VERSION >= 70
    jpeg_add_quant_table(cinfo, tblno, table, cinfo->q_scale_factor[tblno],
                         force_baseline);
#else
    jpeg_add_quant_table(cinfo, tblno, table, q_scale_factor[tblno],
                         force_baseline);

View on GitHub (pinned to 45ab8f4308)