closing shared files

I'm having a problem with shared open data paths...

The company standard is SHARE(*YES) on all files.  Most programs do not 
SETON *INLR when ending.  There is a file opener program (FOP) by which 
programs are called.  The program to be run is a parameter to the FOP.

There is a database of programs and files which contains the files used by a 
program and the programs called by a program.  Each file and program has a 
number betweeen 1 and 9999.  The FOP contains two size 9999 by 1 byte arrays 
for programs and files.  When a file or program is opened, it's byte is set 
to 'X' in the array so a second open is not attempted.

When the FOP is called it will open all files for the program and any 
programs called by the program and so on and then call the program.  The 
files are all opened for *ALL (IOUD) by the opener.  So if program A uses 
file F as input only and then calls program B to update file F, the file is 
open for update and program B will work.

Most programs can call an inquiry.  Files used by the inquiries are not 
opened by the FOP before it calls the program.  However, the inquiry 
programs are called using the FOP. So, in program B above, if the user wants 
his inquiry program C, the files it uses are opened for *ALL by the FOP.  
The user may return to the menu and select an option to update one of the 
files the inquiry program used.  That file will already be open for *ALL so 
the update can take place.

THE PROBLEM is with a program which sets on LR.  When this program ends, any 
files opened by the inquiry process are closed.  The tables in the FOP are 
not changed so it doesn't attempt to open these files again.  If these files 
are opened, they are opened by the application programs and may be input 
only.  If an update is later attempted, it will bomb.

MY QUESTIONS are:
A.  Is this new?  Program FOP opens files and calles program A which calls 
program B which calls FOP which opens more files and calls program C.  Then 
these program end.  Program A ends with LR *ON.  The files opened by the 
second invocation of FOP or by program C are closed.  I don't think it used 
to be this way.

B. Is there a way to keep those files open?



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