There seems to be a DataONTAP version syntax that the VSC 4.2 is looking for. I've installed the VSC and tried to modify the credentials for the controllers running an N-Series 7-mode installation (8.1.2P1) and get an error stating "The call failed on the server; see server....". The VSC logs print out a message stating "unknown exception. For input string: '2P1'". More output from the VSC logs are below.
INFO | jvm 1 | 2013/04/01 06:01:08 | 2013-04-01 06:01:07,979 [pool-27-thread-1] TRACE com.netapp.offtap.ControllerUtil - initializeFiler: <results status='passed'><system-info><system-name>n6040cwy0001</system-name><system-id>0151754843</system-id><system-model>N6040</system-model><system-machine-type>IBM-2858-A20</system-machine-type><vendor-id>IBM</vendor-id><system-serial-number>2858130959811</system-serial-number><partner-system-id>0151754802</partner-system-id><partner-system-name>n6040cwy0002</partner-system-name><system-revision>B2 </system-revision><controller-address>A</controller-address><board-speed>2399</board-speed><board-type>System Board XV</board-type><cpu-part-number>110-00120</cpu-part-number><cpu-revision>A5</cpu-revision><cpu-serial-number>759899</cpu-serial-number><cpu-firmware-release>4.4.0</cpu-firmware-release><number-of-processors>2</number-of-processors><memory-size>4096</memory-size><cpu-processor-type>Opteron</cpu-processor-type><supports-raid-array>false</supports-raid-array></system-info></results>
INFO | jvm 1 | 2013/04/01 06:01:08 | 2013-04-01 06:01:08,166 [pool-27-thread-1] TRACE com.netapp.offtap.ControllerUtil - populateSystemInfo: n6040cwy0001 <results status='passed'><version>Data ONTAP Release 8.1.2P1 7-Mode: Mon Jan 7 15:55:05 PST 2013</version><is-clustered>false</is-clustered></results>
INFO | jvm 1 | 2013/04/01 06:01:08 | 2013-04-01 06:01:08,166 [pool-27-thread-1] DEBUG com.netapp.offtap.ControllerUtil - populateSystemInfo: n6040cwy0001 version returned from system-get-version: Data ONTAP Release 8.1.2P1 7-Mode: Mon Jan 7 15:55:05 PST 2013
INFO | jvm 1 | 2013/04/01 06:01:08 | 2013-04-01 06:01:08,166 [pool-27-thread-1] INFO com.netapp.offtap.ControllerUtil - populateSystemInfo: n6040cwy0001 assigning version of '8.1.2P1'
INFO | jvm 1 | 2013/04/01 06:01:08 | 2013-04-01 06:01:08,166 [pool-27-thread-1] ERROR com.netapp.offtap.ControllerUtil - populateController: NtapFiler[id=0151754843-0, name=n6040cwy0001, connectIpAddress=n6040cwy0001.testlab.acxiom.net] unknown exception. For input string: "2P1"
INFO | jvm 1 | 2013/04/01 06:01:08 | java.lang.NumberFormatException: For input string: "2P1"
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.lang.NumberFormatException.forInputString(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.lang.Integer.parseInt(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.lang.Integer.parseInt(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.offtap.data.NtapVersion.<init>(NtapVersion.java:47)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.offtap.data.NtapVersion.<init>(NtapVersion.java:43)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.offtap.data.NtapVersion.<init>(NtapVersion.java:39)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.offtap.ControllerUtil.populateSystemInfo(ControllerUtil.java:4074)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.offtap.ControllerUtil.initializeFiler(ControllerUtil.java:840)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.offtap.ControllerUtil.populateController(ControllerUtil.java:1317)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.offtap.ControllerManager.addConnection(ControllerManager.java:253)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.kamino.server.ControllerManagerInstance$1.call(ControllerManagerInstance.java:369)
INFO | jvm 1 | 2013/04/01 06:01:08 | at com.netapp.kamino.server.ControllerManagerInstance$1.call(ControllerManagerInstance.java:357)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.util.concurrent.FutureTask.run(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.util.concurrent.FutureTask.run(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
INFO | jvm 1 | 2013/04/01 06:01:08 | at java.lang.Thread.run(Unknown Source)
