We're running CS6 server (multi-instance). Been running fantastic for a while now but recently I'm seeing this error:
One or more placed graphics include OPI information. The information is not permitted in PDF/X compliant files. You can click OK to produce a PDF/X compliant file with no OPI information, but a graphic may be omitted or may be exported at low-resolution if the high-resolution data is not included in the placed graphic.
This happens when a job is processed (an IDML file is processed to render a PDF). Seems the only 'solve' is to restart InDesign Server. I've never seen this issue until this past week and am trying to figure out what might be broken on the template or the server.