Are level checks still useful?

[dale janus <dalejanus@xxxxxxxxxxxxxxxxx>]

We are in the slow, gradual process of changing from DDS to DDL.  
Actually, we are creating new files with ops navigator and usually not 
keeping the create specs.  We just use navigator to change the file when 
needed. Mostly we need record ID and timestamp, or date fields added.

But we have lots of old files.  Yesterday, we needed to add 2 fields to a 
file (a timestamp and a record id, both added with DDL in ops nav.)  
Since we are adding the fields to the end of the files, we figured this 
would be a good time to remove level check from the file.  But it did not 
work.

Here is our process for adding new fields to a file.  We have a library 
that contains all our RPG, DDL, CL etc. but no data.  We add the new 
fields to the file (called DIRECT).  We change to level check *no.  This 
creates an empty file with the new fields.

We write a CL program to copy the data from production library to empty 
library using CPYF with *nochk.  Then in the production library we delete 
all the logicals, rename the existing file to DIRECTOLD.  Next CPYF from 
the empty library file (now filled with production data and new fields) 
to the production library, CRTFILE(*YES) then recreate the logicals.

When checking with DSPFD, both the file in the empty library and 
production library say:
 Record format level check . . . . . . . . . : LVLCHK     *NO

Yet when I run programs against the file DIRECT or its logicals, I get 
level check CPF4131errors.

So I had to recompile all the programs anyway.

We are a small shop with just 2 of us.  We write all our own code, so we 
are quite sure that adding fields to the end of a record will not affect 
old programs.

I am RPG guy, my associate is PHP/WEB guy.  He just kind of rolls his 
eyes at me when I jump through all these hoops to add fields.  His PHP 
programs just keep on rolling, no matter what the file looks like.



So this long discourse asks two questions.

Why do my RPG programs (some RPG III, some ILE) insist on level check 
when the file says LVLCHK *NO?

And

Is level check still useful?  The ability to quickly add fields to files 
seems to outweigh the comfort of your rpg programs knowing exactly what 
the file looks like.  Especially when half (uhh, maybe not half but lots 
of them) of your programs are PHP.

---Dale