Hello, I have used the module ITSMCIAttributeCollection with OTRS since it came available and it has allways worked perfectly, but now I am testing and trying to use it on OTRS 4 and it simply does not work. I've tried on test and clean systems but it does not work, I move the same definition to a OTRS 3.3.x and also 5.x and it works perfect. I am wondering if there is an error with the last package released for OTRS 4. I am using OTRS 4.0. with ITSM 4.0.14 and CIAttributeCollection 4.1.2, OTRS 5, with ITSM 5.0.7 and CIAttributeCollection 5.0.1 I create a class and use a definition as in the example { Key => 'Server', Name => 'Server', Input => { Type => 'CIClassReference', ReferencedCIClassName => 'Server', ReferencedCIClassLinkType => 'Includes', ReferencedCIClassLinkDirection => 'Reverse', } }, I get the field shown in the form, but when I go to the it and try to create a new CI with the relation it just does not do anything, not even the ajax, no errors, no log, it just simply does not do the search. I know it could posible be easier just to migrate into OTRS 5, but I am wondering why it doesn't work at all. -- *Alvaro Cordero RetanaConsultor de Tecnologias* *Tel: 22585757 ext 123* *Email:* alvaro@gridshield.net