# TC.macro not executing on M6 **URL:** \ **Category:** ❓Question\ **Created:** [September 29, 2025, 11:07pm UTC](https://forum.sienci.com/t/tc-macro-not-executing-on-m6/22102 "2025-09-29T23:07:17Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jmac1074](https://forum.sienci.com/letter_avatar_proxy/v4/letter/j/a698b9/32.png) [@Jmac1074](https://forum.sienci.com/u/Jmac1074)\ **Post date:** [September 29, 2025, 11:07pm UTC](https://forum.sienci.com/t/tc-macro-not-executing-on-m6/22102/1 "2025-09-29T23:07:18Z")
**[ Jmac1074](https://forum.sienci.com/u/jmac1074)** Hi, hoping for some more great insight from the community. I am coding a DIY ATC setup. I am leaning a lot on the work people have done for rapidchangeATC (even though my setup is custom and not affiliated with rapidchange). They have good documentation on SienciHAL and GRBLHal implementations that I am referencing. My core problem right now is this: Whether from the console or in a short sample nc file, M6 T\_ commands are not executing TC.macro as they should. Nothing happens. Not even debug messages are printing to the console. No errors. Things to Note: 1. Macros called by MDI commands off the SD card all work flawlessly. 2. All macros are in the root directory of the SD card. 3. I have copied and pasted the exact same code from TC.macro into a numbered macro on the SD card, and it runs perfectly. It’s just basic code, only some motions, so I can visually confirm the M6 is triggering. No fancy complex logic. 4. In my Gsender settings, passthrough M6 and ignore M6 are enabled. 5. I have confirmed that even though the TC.macro doesn’t run, the tool number does update from the M6 T\_ 6. I am using Gsender 1.5.4 and SLB-EXT firmware 5.0.11 on an Altmill 4x4 I have completed all the code, written it, and implemented it to change a tool as an MDI macro with given tool numbers. However, I am now trying to automate this process via M6. Thank you for your help. ---
**Author:** ![Jmac1074](https://forum.sienci.com/letter_avatar_proxy/v4/letter/j/a698b9/32.png) [@Jmac1074](https://forum.sienci.com/u/Jmac1074)\ **Post date:** [September 30, 2025, 9:22pm UTC](https://forum.sienci.com/t/tc-macro-not-executing-on-m6/22102/2 "2025-09-30T21:22:22Z")
Solved my Own issue. Re-flashing the firmware solved it. No idea why but hey. ---
**Author:** ![gwilki](https://forum.sienci.com/user_avatar/forum.sienci.com/gwilki/32/366_2.png) [@gwilki](https://forum.sienci.com/u/gwilki)\ **Post date:** [September 30, 2025, 9:32pm UTC](https://forum.sienci.com/t/tc-macro-not-executing-on-m6/22102/3 "2025-09-30T21:32:57Z")