Hi All,
I'm encountering a critical post-processing issue in Fusion 360 after a recent update, and I'd greatly appreciate your assistance.
Our company recently acquired a new Avid CNC machine, and we're using Fusion 360 for programming. While I'm relatively new to manufacturing in Fusion, I've been successfully generating programs for our machine, which utilize two offsets (G55 and G56) for different sections of the program.
Prior to last week's Fusion 360 update, my programs would post-process without any issues. However, since the update, any program attempting to use both G55 and G56 offsets fails during post-processing. Interestingly, if I post-process operations using only G55 or only G56, they succeed. I've confirmed that my machine in Fusion is set up for multiple offsets, and even attempts to re-post previously working files now result in failure.
The post-processor log consistently shows the following errors:
Warning: -Attention- Property 'Safe Retracts' is set to 'Clearance Height'.
Ensure the clearance height will clear the part and or fixtures.
Raise the Z-axis to a safe height before starting the program.
###############################################################################
Error: Tool length compensation is not active.
Error at line: 2051 (avid cnc.cps)
Error in operation: 'Parallel3'
Failed while processing onSection() for record 21470.
###############################################################################
Error: Failed to invoke function 'onSection'.
Error: Failed to invoke 'onSection' in the post configuration.
Error: Failed to execute configuration.
Stop time: Wednesday, July 30, 2025 2:00:20 PM
Post processing failed.
Regarding the warnings, my "Safe Retracts" settings appear to be configured correctly (screenshot attached).
The "Error: Tool length compensation is not active" is the primary concern. My tool definitions seem correct (screenshots attached), and notably, it's the same tool used across all three operations within both G55 and G56 offsets. The log references "Error at line: 2051 (avid cnc.cps)" and mentions operation 'Parallel3', but if I remove that specific operation, the error simply shifts to the next one in the sequence.
I've attached a sample of the failing G-code (as a text file) and the complete post-processor log for your review.
Any guidance or support you can offer to resolve this issue would be greatly appreciated.
Thank you,
Micah Johnson
