[Koha] Z39.50: Can't call method "size" on an undefined value

[Giuseppe.Angilella at ct.infn.it]

Hi everybody,

I eventually managed to have a Z39.50 client running here (Koha 2.2.0RC5 
on RedHat 9.0).

Looking at the log file, it seems that the client does connect to the 
(various) servers defined, since I can read lines such as:

10027/16 : Processing isbn=0691043655 at LIBRARY OF CONGRESS, WASHINGTON DC, USA z3950.loc.gov:7090 voyager MARC21 (6 forks)
10027/16 : 2 >>
10027/16 : creating and 10027/16 : working on results entry 62
10027/16 : connected to LIBRARY OF CONGRESS, WASHINGTON DC, USA

However, after a search has been done, I get error messages such as:

Can't call method "size" on an undefined value at /usr/local/koha/intranet/scripts/z3950daemon/processz3950queue line 277.

I tried to edit the processz3950queue script, and line 277 is indeed where 
size() is first called:

my $numresults=$rs->size();

(Line numbering may be different from your copies of processz3950queue, 
since I had to include the line:

my $context = C4::Context->new("/etc/koha.conf");

as suggested in previous postings, to have processz3950queue working.)

I believe that a search has been done, but the results cannot be retrieved 
and/or saved in Koha's database, because at this point the perl script 
generates the above error.

In addition to that, and seemingly independently from that, 
processz3950queue enters a loop, with many lines like

starting loop

in the log file.

I did specify

export LIB5PERL=/usr/local/koha/intranet/modules

and did start the Z39.50 client via

./z3950-daemon-launch.sh

Any help?

Thank you again in advance.

Giuseppe.