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Assuming the uEye camera is USB, many people have had trouble attempting to run multiple Xtions off of one USB bus, due to bandwidth issues.

If your computer has multiple USB buses, try plugging the cameras into both separately. You might also find it hopeful to look at (and post) the dmesg kernel buffer, as any low level hardware-related error messages are likely to show up there.

Assuming the uEye camera is USB, many people have had trouble attempting to run multiple Xtions off of one USB bus, due to bandwidth issues.

issues. If your computer has multiple USB buses, try plugging the cameras into both separately. separately.

You might also find it hopeful helpful to look at (and post) post here) the dmesg kernel buffer, as any low level hardware-related error messages are likely to show up there.