Hi there. I've a serious problem... The patrons can exceed the number of holds allowed. This is my circulation matrix. Alunos CET Monografia Geral 3 10 0.50 1 0 0 2 3 0.000000 Alunos Doutoramento Monografia Geral 6 10 0.50 1 0 0 2 6 0.000000 Alunos Erasmus Monografia Geral 3 10 0.50 1 0 0 2 3 0.000000 Alunos Erasmus Monografia Referência 3 10 0.50 1 0 0 2 0 0.000000 Alunos Licenciatura Monografia Geral 3 10 0.50 1 0 0 2 3 0.000000 Alunos Mestrado Monografia Geral 6 10 0.50 1 0 0 2 6 0.000000 Alunos Pós-graduação Monografia Geral 6 10 0.50 1 0 0 2 6 0.000000 Docentes Monografia Geral 6 10 0.50 1 0 0 2 6 0.000000 Docentes Monografia Handbook 3 2 0.50 1 0 0 2 0 0.000000 Funcionários Monografia Geral 3 10 0.50 1 0 0 2 3 0.000000 Investigadores Monografia Geral 6 10 0.50 1 0 0 2 6 0.000000 For example the holds allowed for one patron with category "Alunos Licenciatura" for item types "Monografia Geral" are 3 holds, but in the OPAC the users can put on hold more than 3 items of that type. Who I can solve it? Which is the perl function, library for holding? Perl is not a problem for me and maybe a can solve it changing the code. Is a Koha bug? Regards. Vitor Fernandes