What is hotfix and error while installing a hotfix via ICONTROL?

Hotfix is lik a patch to an OS. But if i intall a hotfix it must apply on an already present boot location but it creates a new loacation and boots from there.Now i need to know .Can i delete a primary boot location after installing a hotfix or i need to keep all partition??? and also while i try to install a hotfix on box using i control it gives an exception.

"Exception in thread "main" AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server faultSubcode: faultString: Exception caught in System::urn:iControl:System/SoftwareManagement::install_hotfix() Exception: Common::OperationFailed primary_error_code : 16908289 (0x01020001) secondary_error_code : 0 error_string : Error installing hotfix "Hotfix-BIGIP-11.4.0-2419.0-HF3.iso" faultActor: faultNode: faultDetail: {http://xml.apache.org/axis/}stackTrace:Exception caught in System::urn:iControl:System/SoftwareManagement::install_hotfix() Exception: Common::OperationFailed primary_error_code : 16908289 (0x01020001) secondary_error_code : 0 error_string : Error installing hotfix "Hotfix-BIGIP-11.4.0-2419.0-HF3.iso" at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222) at org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129) at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source) at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227) at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696) at org.apache.axis.Message.getSOAPEnvelope(Message.java:435) at org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62) at org.apache.axis.client.AxisClient.invoke(AxisClient.java:206) at org.apache.axis.client.Call.invokeEngine(Call.java:2784) at org.apache.axis.client.Call.invoke(Call.java:2767) at org.apache.axis.client.Call.invoke(Call.java:2443) at org.apache.axis.client.Call.invoke(Call.java:2366) at org.apache.axis.client.Call.invoke(Call.java:1812) at iControl.SystemSoftwareManagementBindingStub.install_hotfix(SystemSoftwareManagementBindingStub.java:1158) at com.payoda.iControl.upgrade.VersionManagement.installHotFix(VersionManagement.java:247) at com.payoda.iControl.upgrade.VersionManagement.main(VersionManagement.java:100)

{http://xml.apache.org/axis/}hostname:PTPLD105

Exception caught in System::urn:iControl:System/SoftwareManagement::install_hotfix() Exception: Common::OperationFailed primary_error_code : 16908289 (0x01020001) secondary_error_code : 0 error_string : Error installing hotfix "Hotfix-BIGIP-11.4.0-2419.0-HF3.iso" at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222) at org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129) at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source) at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227) at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696) at org.apache.axis.Message.getSOAPEnvelope(Message.java:435) at org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62) at org.apache.axis.client.AxisClient.invoke(AxisClient.java:206) at org.apache.axis.client.Call.invokeEngine(Call.java:2784) at org.apache.axis.client.Call.invoke(Call.java:2767) at org.apache.axis.client.Call.invoke(Call.java:2443) at org.apache.axis.client.Call.invoke(Call.java:2366) at org.apache.axis.client.Call.invoke(Call.java:1812) at iControl.SystemSoftwareManagementBindingStub.install_hotfix(SystemSoftwareManagementBindingStub.java:1158) at com.payoda.iControl.upgrade.VersionManagement.installHotFix(VersionManagement.java:247) at com.payoda.iControl.upgrade.VersionManagement.main(VersionManagement.java:100)"