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CHAIN COMMAND
6.4 -- Execution Operators
cannot be Jumped
~o
with the
~MP
operator}
even
if it
has
a
defined
label.
Jumps to undefined labels or backward Jumps
will cause the CHAIN process to be aborted.
6.4.7 LBL operator
The LBL operator
is
used to define a
label
within
the
CHAIN
file.
All labels referenced by the JMP operator must
be defined with the LBL operator.
The
format
of
the
LBL
operator is:
where
<label>
names (section
undefined,
or
@LBL <label:>
follows
the
same restrictions placed on tag
6.2).
Labels
that
are
multiply
defined,
backward references will be flagged as errors
during the
CHAIN
compilation
phase.
the CHAIN process to be aborted.
Such errOrs
will
cause
6.4.8 CMD operator
Normally,
during
the
execution phase,
as
commands are
processed from the intermediate file,
each
command
line
is
displayed
on
the
console.
Likewise, all· input reQ.uested
by
the command that is supplied from the intermediate rile
will
be displayed on the console.
The CMD operator can be used to
suppress console display or
all
input
that
originates
rrom
the
intermediate
rile.
The CMD operator has the
follo~ing
format:
@CMD {ON
or
OFF}
where either ON or OFF must be specified.
The
CMD
operator
can
be
used as many times as needed within the inteTmediate
file.
Initially during the execution phasel the
ON
form
of
the CMD operator is in effect.
6. 5 Messages
The
following
messages
can
be displayed
b~
the
CHAIN
command.
The standard errol' messages that c:an
be
displayed
by all commands are not listed here.
The
messages are broken
up
into two sections:
those that can
be
displayed during the
c:ompilation phase, and those that can be displayed during the
execution phase.
The following error messages
can
be
displayed
during
the
compilation
phase:
Page
06-13
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