===== ISTEM =====
Our nightly export job crashed. I've attached the full log (export_2026-09-18.log). Read it and tell me the root cause and the exact line in our code where it fails.

===== HAM YANIT =====
Please **upload or paste the content of the `export_2026-09-18.log` file.**

As an AI, I cannot see files attached to your local system unless you upload them directly to this chat or provide the text content here. 

**Once you provide the log, I will:**
1.  Identify the specific exception or error message.
2.  Trace the stack trace to the exact file and line number in your codebase.
3.  Explain *why* the failure occurred and suggest a fix.