@@ -21,3 +21,17 @@ Under this environment, I created a branch in [tasking](https://code.ornl.gov/6o
## Prompt 1
You are working on the tasking project, bl4b-tthd-investigation branch. The code uses the Experimental Physics Industrial Control System (EPICS) as its basis. You had previously performed investigations of problems with the S3 and DANGLE motion at *another* beamline, and I reference your work in tasking/S3-Gap-Failure-Analysis.md and tasking/DANGLE-Motion-Failure-Analysis.md which you may profit from to orient yourself. The task is to analyze the reason for motion control problems that started on the 'tthd' motor on 2026-04-10 23:56. This was an unexpected motion. Please read /SNS/users/6ov/BL4B/2026/04/12/WangHarveyHicksGeng-2026-04-13.pdf. The process variable is BL4B:Mot:tthd, which is a virtual motor atop a complex setup that you will need to understand fully. You are not executing on the same computer that the system ran on. I have made as much of the environment available to you on this machine, please let me know if there is document that you require. The code that configures the motion is one of two modules; either /home/controls/bl4b/applications/bl4b-Galil1/, or /home/controls/bl4b/applications/bl4b-Galil2/. The code for the component software modules is in /home/controls/common/*. The log files are in /home/controls/var/log/*. Your task is to do a deep and thorough investigation of the reported files, the documents, the code, the configuration files and try to determine the root cause of the problem. Please be diligent and resourceful. If you need a tool to analyze the data that you do not have, use venv, uv and/or pixi to install it ask me to help you.
Claude produced [tthd-Motion-Failure-Analysis.md](tthd-Motion-Failure-Analysis.md) and I asked for [tthd-Motion-Failure-Analysis.pdf](tthd-Motion-Failure-Analysis.pdf).
### Prompt 1.1 - 1.2
❯ Very good! Would you please make a tasking/tthd-Motion-Failure-Analysis.pdf file so that I can share your report with the engineers?
❯ Magnificient! I see what you did with the 'md2pdf.py' command I'll remember to do that for myself next time! Thank you again for a great investigation. Are there any learnings that we should add to the knowledge-transfer system?
Claude made updates and commited to [Claude:main](https://code.ornl.gov/6ov/claude/-/tree/main) and [tasking:bl4b-tthd-investigation](https://code.ornl.gov/6ov/tasking/-/tree/bl4b-tthd-investigation).
# Prompt 2
In your report, you mentioned that 'BL4B:Mot:zd' was frozen (due to a dbpf in the st.cmd file). However, there is a 2nd Galil IOC at /home/controls/bl4b/applications/bl4b-Galil2/bl4b-Galil2App/Db/bl4b-Galil2.substitutions that appears (to me) to handle zd. Please research this new controller. Does it revise your analysis in any way?
