here is a detailed knowledgebase articel, how to solve this problem.
this can help you maybe out.
Identifying Affected LUNs and Hosts The following steps provide a procedure that can be used to identify the I/O access that is responsible for triggering the error. The process of identifying the I/O access begins by identifying the LUNs receiving the I/O through the partner node's FCP target port. With the LUNs identified, the next step is to identify the initiators performing the I/O. Next, identify the FCP target ports on the storage controller that host the LUNs. The host should have access to at least one port on each node of the storage controller cluster. Once the host initiators and primary FCP target ports have been identified, the fabric can be inspected for correct and functioning connections and finally the hosts' multipath configurations can be inspected for correct operation.
Identify the LUNs being accessed through the partner node's FCP Target port. a. lun stats -o (LUN STATISTICS)
Identify the host initiators that are performing the I/O through the partner path a. lun config_check -A (LUN CONFIG CHECK) - output is only valid when viewed in AutoSupport b. lun show -v (LUN CONFIGURATION) c. igroup show -v (INITIATOR GROUPS)
Identify the primary storage controller FCP target ports available for access to the LUN. a. fcp show cfmode (FCP CFMODE) b. fcp show adapters (FCP TARGET ADAPTERS)
Verify the host initiator connectivity to primary FCP target ports and the host MPIO software configuration.
Verify use of the partner path has ceased from both cluster nodes. a. sysstat -b 1
You can see from the `igroup show` output that the initiator in question is accessing via vtic rather than local ports:
Member: 21:00:00:24:ff:04:91:ed (logged in on: vtic)
You then need to identify the host in question from it's WWPN and check your MPIO config i.e. which path(s) have been set as preferred for the LUN(s) in question. Ensure you set the path using local ports as preferred and you shouldn't receive the error messages anymore.