An unexpected error has occurred!
Error Message:The Data Extension name for a LookupRows function call is invalid. A Data Extension of this name does not exist. Data Extension Name: NEW_Master_Subscriber_DE Function Call: LookupRows("NEW_Master_Subscriber_DE", "SubscriberKey", @SubscriberKey ) Parameter Name: DataExtensionName Parameter Ordinal: 1
Description:An unexpected error occurred during the execution of the page.
line 0, column 0
Exception Info:
An error occurred when attempting to parse HtmlEmailBody content for HTML content.
  MemberID: 7004054
  JobID: 0
  ListID: 51
  Content Begins With: 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "

ExactTarget.OMM.InvalidScriptException:  The SET variable value expression is invalid.  See inner exception for detail.
  Script: SET @RowSet = LookupRows("NEW_Master_Subscriber_DE", "SubscriberKey", @SubscriberKey )
  Variable Name: @RowSet
  Index: 4635
  ListID: 51
Source:  OMMCommon