Hi, I can´t get hold items information from KOHA to "3M selfcheck Machine" over SIP2 protocol . after I checked the log, i can view something then add the line *syslog("LOG_DEBUG",Dumper($itemlist))*; in file */usr/share/koha/lib/C4/SIP/Sip/MsgType.pm* (aprox line 907) to verify the information about that. *Jul 17 18:27:07 srvkohapru koha_sip[7932]: Summary_info: index == '0', field 'AS'* Jul 17 18:27:07 srvkohapru koha_sip[7932]: summary_info: list = (HASH(0x528a1a0)) Jul 17 18:27:07 srvkohapru koha_sip[7932]: $VAR1 = [#012 { #012 'timestamp' => '2015-07-15 16:08:49', #012 'expirationdate' => undef, #012 'priority' => '0', *#012 'biblionumber' => '51666',* #012 'suspend_until' => undef, #012 'cancellationdate' => undef, #012 'found' => 'W', #012 'waitingdate' => '2015-07-15', #012 'borrowernumber' => '26038', #012 'notificationdate' => undef, #012 'itemnumber' => '85076', #012 'branchcode' =>'BIBARA', #012 'lowestPriority' => '0', #012 'constrainttype' => 'a', #012 'reservedate' => '2015-07-15', #012 'reminderdate' => undef, #012 'reservenotes' => undef, #012 'suspend' => '0'#012 }#012 ]; *Jul 17 18:27:07 srvkohapru koha_sip[7932]: add_field: Undefined value being added to 'AS'* like you can see the information is placed in $itemlist, but crashes in add_field. Can any helpme to solve this issue?, I really appreciate your help -- Sincerelly, Humberto Blanco