IBM AS/400 manual Analyzing Your Conversion

Analyzing Your Conversion

¹Record address file (RAF) entries on extension specifications have

replaced by the keyword RAFDATA on the File Description specificat

¹ The	line	counter	specifications have been eliminated. They have b
by	the	keywords	FORMLEN and FORMOFL on the file description specific
See	Lines	6 and	7.

¹All specification types have been expanded to allow for 10-charac fields and files.

¹ In RPG IV, data					structures (which are defined using		definition
must precede the input specifications.
Note	that		in	the	converted source, the data structure		DS1	(Line
moved to			precede		the specification containing the FORMAT1		informatio
19).
¹ In	RPG	III,		named		constants can appear in the middle	of	a dat
is	not	allowed		in	RPG	IV.

In the converted source, CONST1 (Line 16) has been moved to follow structure DS1 (Line 11).

¹ If a specification is moved, any comment that precedes it is al

In	the	converted	source, the comments above CONST1 and DS1 were m
with	the	following	specifications.

¹In RPG III, to define an array as a data structure subfield

array

and

a

data

structure

subfield with

the

same

name.

This

d

is not allowed in RPG IV. Instead you specify the

array

attrib

define

the

subfields

using

the

new keyword

syntax.

In this example, ARR1 is defined twice in

the

OPM

version,

but

h

merged

into

a

single

definition

in converted

source.

See

Lines 13

The merging

of

RPG

III array

specifications may result

in

the

array definitions. If the reordered arrays are compile-time arr

loading		of		array	data may be affected. To overcome this proble
vides		a	keyword		format for the ** records. Following **, you enter
keywords FTRANS, ALTSEQ, or CTDATA. If							the keyword	is	CTDATA,	you
enter		the		array	or	table name in	positions 10	-	19.
In	this		example,		the array ARR2 now precedes			array		ARR1,	due
of	the		two	RPG	III specifications for ARR2. The Conversion Aid
the	keywords and				array names in the converted ** records, which
correct			loading of			the compile-time	data. See	Lines 29		and	31.

¹Note that array syntax has changed. The notation ARR1,3 in RPG I ARR1(3) in RPG IV. See line 28.

Analyzing Your Conversion

The	Conversion Aid		provides you with two ways to analyze your convers
They		are:
¹	The	conversion	error report
¹	The	log file

Appendix B. Using the RPG III to RPG IV393 Conversion Aid