Re: Record Lock error

> What is the best / most efficient way to code for
> a record / file lock error in RPGiv?

Beats me what the best might be.  But here are some things to consider: a
record lock is an I/O error, so you'll have to trap it.  Your choices are an
indicator in the LO columns, the (e) extender on the CHAIN or READ, *PSSR or
perhaps MONITOR.  I tend to use the extender and the %error BIF.

c     MasKey        Chain(e)  RMASTER
c                   if        %error
c                   dump
c                   endif

Once you've trapped the I/O error, you should probably check to see exactly
what sort of I/O error you have, because you could have something unpleasant
like a damaged file.

FMaster    UF   E           K Disk
F                                     INFDS(MasFeedback)
DMasFeedback      DS
D  StsMasStatus     *STATUS

StsMasStatus is 01218 for a record lock.  Other status codes can be found in
the Error Handling chapter of the RPG Reference manual.  Never assume that
all I/O errors are record locks.  That will give someone in the future a Bad
Day.

You may want to report some details about which other process is holding the
lock.  The program status data structure can help:

D                SDS
D  StsErrMsg             91    170

StsErrMsg holds the text of the CPF5027 error message.

Assuming that you want the record lock to occur, you might consider changing
the WAITRCD parameter on the file (either through CHGPF or OVRDBF) to a
smaller value than the default of 60 seconds.  If an interactive user is
waiting on a lock, 60 seconds can seem like an eternity.

ovrdbf master waitrcd(3)
call rcdlock2
Record 1648 in use by job 497089/BUCK/TN5250.

Never trap an error and then ignore it.  If you trap an error, DO
something - even if it is a DUMP and RETURN out of the program.  Ignoring
the error will definitely cause someone in the future to have a Bad Day.
  --buck