Resolution:
You must match the three independent criteria specified in (or allowed to default in) the call in a single IO PCB so AMB can choose it for the call. The criteria to select an IO PCB is:
Review the call to determine the PCB requirements. Either modify the PSB to provide a PCB with appropriate options (and redefine the modified PSB to AMB DDI) or modify the call so that its PCB requirements meet an IO PCB that is available within the PSB. See Coding IMS DDI Statements.