Strange Tool Change question to tool length comparison

Hi,
i have an old Linuxcnc system with manual Toolchange which
behaves like t1 M6 and if next tool T2 M6 for instance the length difference of Tooltable is used
Now a very new Linuxcnc installation (the latest ISO Disk ) the T2 m6 requires an G43 to use the tool length compensation

so my question is that a change to Linuxcnc newer version or is there any hidden ini magic to change the behavior ?
in worst case we do need to change the post processor of the cam for the one machine and another for other machine ?

i use linuxcnc for a verry long time but that would help me a lot
thomas

Maybe, in the ini files on your two versions under the RS274NGC section, does the RS274NGC_STARTUP_CODE = line have a G43 on it in the old config and not the new one?
linuxcnc.org/docs/2.6/html/config/ini_co...sub:RS274NGC-section

Otherwise I don't know why the behavior may have changed for you. But for myself I consider it the best practice to explicitly state G43Hn after every tool change anyway.