manual tool change

Hi guys,

LinuxCNC 2.5.3
I used a script (described here) to use manual toolchange. I.e., when M6 T1 is issued, program stops, allowing me to touch off manually, and then hitting Continue in dialog box run a program further. That seem working well.

But randomly, on same program, the M6 T* is just ignored. Program doesn't stop, no dialog box appear. LinuxCNC silently changes a tool number (you may see it in bottom of Axis screen), and run a program further.

Just an example:


G0 x100
M6 T1 <-- this line may be ignored, if I already have T1 installed, that's ok. Tool number is being changed here to 1
M3 S2000
G0 x200
M6 T2 <-- this line sometimes is ignored for no reason, even currently installed tool is 1.
M3 S2000
G0 x100

There's a hal_manualtoolchange file in attach.





Did anyone see such behavior?

Thanks in advance!