4.3.1 The SYNTAX condition The SYNTAX condition is of internal origin, and is raised when any syntax or runtime error is discovered by the REXX interpreter. It might be any of the situations that would normally lead to the abortion of the program and the report of a REXX error message, except error message number 4 (Program interrupted), which is handled by the HALT condition. There are several differences between this condition and the standard condition: · It is not possible to trap this condition with the method CALL, only method SIGNAL. The reason for this is partly that method CALL tries to continue execution until next boundary before triggering the trap. That might not be possible with syntax or runtime errors. · When this condition is trapped, the special variable RC is set to the REXX error number of the syntax or runtime error that caused the condition. This is done just before the setting of the special variable SIGL. · The default action of this condition if the trap state is OFF, is to abort the program with a traceback and error message. · There is not delay-action for condition SYNTAX, since it can not be trapped by method CALL, and consequently never can get into state DELAY. The descriptive text returned by CONDITION() when called with the Description option for condition SYNTAX, is implementation dependent, and may also be a nullstring. Consult the implementation-specific documentation for more information.