RE: base release 3.13.4

["Jeff Hill" <johill@lanl.gov>]

> 
> Steven Hartman wrote:
> > 
> > On Fri, 15 Dec 2000, Marty Kraimer wrote:
> > > Release 3.13.4 is now available.
> > 
> > I have experienced a problem with ca clients (including medm, probe, etc.)
> > compiled under 3.13.4 in connecting to PVs on 3.11 IOCs. The same clients
> > compiled using 3.13.3 work normally in connecting to these same PVs. For
> > example, using caExample (on a Solaris 7 host to get a PV residing on a
> > 3.11 ioc) . . .
> 
> I dont think that anyone doing development still has access to any 3.11 systems.
> Thus it is not too surprising that your problem is occuring. Since none of the
> developer's have a 3.11 system available this may not be easy to fix.
> 

Fortunately, there were very few changes between EPICS R3.13.3 and EPICS 
R3.13.4.

I suspect that if you remove the if statement labeled "before" below 
on line 1048 in the R3.13.4 epics/base/ca/service.c ()
and replace it with the code labeled "after" below 
that you will find that R3.13.4 will connect properly with R3.11.

before:
>     if ( piiu->state != iiu_connected ) {
> 		UNLOCK;
> 		return;
>     }

after:
    if ( CA_V42( CA_PROTOCOL_VERSION, piiu->minor_version_number ) ) {
        if ( piiu->state != iiu_connected ) {
	        UNLOCK;
	        return;
        }
    }

Sorry about the inconvenience. As Marty undedicated it is very difficult to
test against very old releases.

I have tested this change with R3.13 servers. Please let me know if this change
works with R3.11 systems and I will commit it on the R3.13 patch branch. 

I would also like to hear from any other sites that are still using an EPICS 
release prior to R3.12.

Jeff