Transceiver is not accessible

Hello,

i've seen the follwing Errors in my Log, but I am not able to identify the tranceivers:

<11> Aug 12 01:05:37 Core-3 DRIVER[unitMgrTask]: hpcsfp.c(489) 6475008 %% s/p(0/15): Task: bcm_rpc_server_000, plugged in Transceiver is not accessible. Please re-insert or check the module.
<13> Aug 12 01:05:37 Core-3 BSP[unitMgrTask]: hpc_sfp_support.c(3058) 6475007 %% Unable to read the EEPROM data of SFP+ module in port 0/15
<11> Aug 12 01:05:37 Core-3 DRIVER[unitMgrTask]: hpcsfp.c(489) 6475006 %% s/p(0/15): Task: bcm_rpc_server_000, plugged in Transceiver is not accessible. Please re-insert or check the module.
<12> Aug 11 22:53:42 Core-1 General[procLOG]: procmgr.c(2903) 6352149 %% Pruned Error Log (Max Log Size:1048576, Detected Log Size:1048810, File:/tmp/logs/openapi.log, Size:1048810)
<11> Aug 11 22:40:28 Core-3 DRIVER[unitMgrTask]: hpcsfp.c(489) 6339814 %% s/p(0/27): Task: bcm_rpc_server_000, plugged in Transceiver is not accessible. Please re-insert or check the module.
<13> Aug 11 22:40:28 Core-3 BSP[unitMgrTask]: hpc_sfp_support.c(3058) 6339813 %% Unable to read the EEPROM data of SFP+ module in port 0/27
<11> Aug 11 22:40:28 Core-3 DRIVER[unitMgrTask]: hpcsfp.c(489) 6339812 %% s/p(0/27): Task: bcm_rpc_server_000, plugged in Transceiver is not accessible. Please re-insert or check the module.
<11> Aug 11 22:38:15 Core-3 DRIVER[unitMgrTask]: hpcsfp.c(489) 6337739 %% s/p(0/6): Task: bcm_rpc_server_000, plugged in Transceiver is not accessible. Please re-insert or check the module.
<13> Aug 11 22:38:15 Core-3 BSP[unitMgrTask]: hpc_sfp_support.c(3058) 6337738 %% Unable to read the EEPROM data of SFP+ module in port 0/6
<11> Aug 11 22:38:15 Core-3 DRIVER[unitMgrTask]: hpcsfp.c(489) 6337737 %% s/p(0/6): Task: bcm_rpc_server_000, plugged in Transceiver is not accessible. Please re-insert or check the module.
<11> Aug 11 21:44:46 Core-1 DRIVER[tRpcsrv.01000]: hpcsfp.c(489) 6287935 %% s/p(0/11): Task: tRpcsrv.01000, plugged in Transceiver is not accessible. Please re-insert or check the module.
<13> Aug 11 21:44:46 Core-1 BSP[tRpcsrv.01000]: hpc_sfp_support.c(3058) 6287934 %% Unable to read the EEPROM data of SFP+ module in port 0/11
<11> Aug 11 21:44:46 Core-1 DRIVER[tRpcsrv.01000]: hpcsfp.c(489) 6287933 %% s/p(0/11): Task: tRpcsrv.01000, plugged in Transceiver is not accessible. Please re-insert or check the module.

There seem a Problem with three trasceifers 0/6, 0/11 and 0/27, but there are no such interfaces in the Stack. Its a Stack of three M4300-96x's. Interfaces named like 1/1/1,  1/1/5 and so on. How do I identify the Transceivers?

Regards