FavoriteJulie Leszczynski (Equips) asked in #VisualforceFeb 23, 2017, 8:21 PMActivity History' is not a valid child relationship name for entity AccountI am trying to create a Tabbed Account page and keeping getting the following Error:Activity History' is not a valid child relationship name for entity Account I have tried several of the recommendations given but nothing is working. Can you please review my code:<apex:page standardController="Account" showHeader="true" tabStyle="account" > <style> .activeTab {background-color: ⌗236FBD; color:white; background-image:none} .inactiveTab { background-color: lightgrey; color:black; background-image:none} </style> <apex:tabPanel switchType="client" selectedTab="tabdetails" id="AccountTabPanel" tabClass="activeTab" inactiveTabClass="inactiveTab"> <apex:tab label="Details" name="AccDetails" id="tabdetails"> <apex:detail relatedList="false" title="true"/> </apex:tab> <apex:tab label="Contacts" name="Contacts" id="tabContact"> <apex:relatedList subject="{!account}" list="contacts" /> </apex:tab> <apex:tab label="Open Activities" name="OpenActivities" id="tabOpenAct"> <apex:relatedList subject="{!account}" list="OpenActivities" /> </apex:tab> <apex:tab label="Activity History" name="ActivityHistory" id="tabActiHis"> <apex:relatedList subject="{!account}" list="Activity History" /> </apex:tab> <apex:tab label="Contracts" name="Contract" id="tabContract"> <apex:relatedList subject="{!account}" list="Contracts" /> </apex:tab> <apex:tab label="Opportunities" name="Opportunities" id="tabOpp"> <apex:relatedList subject="{!account}" list="opportunities" /> </apex:tab> <apex:tab label="Cases" name="Case" id="tabCases"> <apex:relatedList subject="{!account}" list="Cases" /> </apex:tab> <apex:tab label="Underwriting & Service" name="Underwriting_Service" id="tabUndeSer"> <apex:relatedList subject="{!account}" list="Underwriting_Service" /> </apex:tab> <apex:tab label="Notes and Attachments" name="NotesAndAttachments" id="tabNoteAtt"> <apex:relatedList subject="{!account}" list="CombinedAttachments" /> </apex:tab> </apex:tabPanel></apex:page>Thank You - JulieShow More6 answersSortSort by DateSort by Most HelpfulSort by DateLoad more comments...Julie Leszczynski (Equips)Feb 24, 2017, 7:17 PMTHAT WORKED - YOU ROCK! Thanks So MuchAdd a commentWrite an answer...BoldItalicUnderlineStrikethroughBulleted ListNumbered ListAdd linkCode blockInsert imageAttach filesLink URLCancelSave0/9000Reply