Use this template when emailing support:

Subject: Registration code issue — ASC Timetables 2023

Body:

Q: I lost my registration code for my 2023 ASC timetable. Can I get a new one? A: Yes, but with difficulty. Most departments have a "Code Regeneration" fee or form in 2023 due to automated bots. Visit the Registrar’s office with your student ID.

Q: Can I use a registration code from the 2022 timetable for a 2023 class? A: No. ASC codes are year-locked. A code intended for Fall 2022 will generate an "Archive Error" in the 2023 system. You must request a 2023-specific code.

Q: Why does my ASC timetable show Monday classes when I registered for Tuesday? A: This is often a "Section Mismatch." The registration code you entered corresponds to a specific section. Double-check the 8th digit of your code. If it says 01, that is usually Monday/Wednesday; 02 is usually Tuesday/Thursday.

The registration code system was enhanced in 2023 to:

If the code is rejected, try these fixes:

Losing your code before accessing the ASC timetable is stressful but fixable.

The 2023 version likely still uses a modified CRC32 + XOR cipher similar to v2020–2022:

Code format: AAAA-BBBBB-CCCCCC
- AAAA: product ID (fixed: TIM3)
- BBBBB: encrypted HWID hash (5 chars)
- CCCCCC: checksum of first two parts

Validation steps: