Hi Mandhu,
Failed messages in PI can only be canceled in some of the pipeline steps.
For example if the error occurred during receiver determination I believe you can cancel but some cases this is not possible.
You cancel the messages by selecting the line in sxi_monitor and press the Ctrl+F8 (pencil with green "V" mark).
For message search by ID you should select in the report screen of SXI_MONITOR the tab "Advanced selection criteria) where you can enter the ID.