Message I get is "you must have Sage 300 Constr & RE Acctg 15.1.0 installed before you can apply this update"
Hi Tina - are you on the base install of 15.1.0? the rev3 is just an update package. 15.1.0 is a separate download. Here is the link for the base product:
https://support.na.sage.com/selfservice/viewdocument.do?noCount=true&externalId=69096&sliceId=1&cmd=¤tmsID=MS_Customer&docLink=true&isDocLink=true&languageId=&ViewedDocsListHelper=com.kanisa.apps.common.BaseViewedDocsListHelperImpl
*Community Hub is the new name for Sage City