If a syntax error in main.mk or other *.mk files occurs,
Check_MK used to abort any operation. This is nasty when for example a new
variable that has been introduced in a new version is not known in an older
version of Check_MK and thus after a version downgrade the configuration
cannot be activated any more.
The behaviour has now changed so that in case of such an error Check_MK will only
abort in interactive mode, i.e. if the standard output is a terminal.
That means that WATO will always try to activate Changes. You can force the
old behaviour by adding the new option --interactive.
To the list of all Werks