PID Calibration Tool Throws Errors With Variable Name Expansion

[NoGare]

Good day,
I'm running into an issue when trying to run the calibration tool (as my servo's need additional tuning). In my view, I feel that this issue might be a result of variable name expansion - where the tool does not like the fact the way I've setup my .HAL file - but I cannot confirm this.
LinuxCNC version: 2.9.8
OS: Debian 13

Steps to Reproduce: Within any GUI, launch the calibration tool. If a refresh is attempted or any value is attempted to be saved - a variation on the below error occurs. If I manually hardcode the value of mesa_pwm_pin instead of using variable expansion, it no longer complains and moves on to complaining about the next use of variable expansion (e.g. 'MESA_encoder_PIN'). 

Expected Behavior: Calibration tool should function without requiring a full edit of my .HAL file.

Thank you in advance for your time, or any work around you can suggest - apologizes if this is simply an error on my end.

Regards -

Error from Calibration Tool:

invalid command name ".main.top.fpage2.next-(mesa_pwm_pin).dither true"
    while executing
"$labelname-$name configure -state $entrystate"
    (procedure "iniTuneButtonpress" line 34)
    invoked from within
"iniTuneButtonpress refresh"
    invoked from within
".main.top.fpage2.buttons.refresh invoke"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 [list $w invoke]"
    (procedure "tk::ButtonUp" line 22)
    invoked from within
"tk::ButtonUp .main.top.fpage2.buttons.refresh"
    (command bound to event)

Offending Lines in .HAL file that error is referencing

#PWM Generator setup
setp hm2_[MESA](BOARD).0.pwmgen.[JOINT_2](MESA_PWM_PIN).dither true
setp hm2_[MESA](BOARD).0.pwmgen.[JOINT_2](MESA_PWM_PIN).output-type 1 #PWM pin0
setp hm2_[MESA](BOARD).0.pwmgen.[JOINT_2](MESA_PWM_PIN).offset-mode 1 # offset mode so 50% = 0
setp hm2_[MESA](BOARD).0.pwmgen.[JOINT_2](MESA_PWM_PIN).scale [JOINT_2]SCALE

# position command and feedback
net joint-2-pos-cmd <= joint.2.motor-pos-cmd
net joint-2-pos-cmd => pid.z.command

net joint-2-pos-fb <= hm2_[MESA](BOARD).0.encoder.[JOINT_2](MESA_encoder_PIN).position
net joint-2-pos-fb => joint.2.motor-pos-fb
net joint-2-pos-fb => pid.z.feedback

# PID Output
net joint.2.output <= pid.z.output
net joint.2.output => hm2_[MESA](BOARD).0.pwmgen.[JOINT_2](MESA_PWM_PIN).value

# Encoder Setup
setp hm2_[MESA](BOARD).0.encoder.[JOINT_2](MESA_encoder_PIN).scale [JOINT_2](ENCODER_SCALE)
setp hm2_[MESA](BOARD).0.encoder.[JOINT_2](MESA_encoder_PIN).counter-mode 0
setp hm2_[MESA](BOARD).0.encoder.[JOINT_2](MESA_encoder_PIN).filter 1
setp hm2_[MESA](BOARD).0.encoder.[JOINT_2](MESA_encoder_PIN).index-invert 0
setp hm2_[MESA](BOARD).0.encoder.[JOINT_2](MESA_encoder_PIN).index-mask 0
setp hm2_[MESA](BOARD).0.encoder.[JOINT_2](MESA_encoder_PIN).index-mask-invert 0

From main.ini where I define the variables to be expanded.

[JOINT_2]
# MESA_PWM_PIN & MESA_encoder_PIN are the pin numbers used on the 7I97T MESA board for this axis 
# Z and Y Mesa Pins swapped for vertical machining
MESA_PWM_PIN = 01
MESA_encoder_PIN = 01
CARD = 0
TAB = 1
AXIS = Z
...

[grandixximo]

@NoGare I opened #4166 with a fix. The calibration tool was treating the ini reference in your pin name ([JOINT_2](MESA_PWM_PIN)) as a tunable value, which produced an invalid widget name. It now only picks up references that are the value of a setp (so .scale [JOINT_2]SCALE still shows up, the .dither/.output-type lines no longer error).

Could you test against your config and confirm? You can just replace tcl/bin/emccalib.tcl with the version from the PR.