assertion failed for path

Hi,guys,I am having this problem assertion failed all the time.

XPathContains assertion failed for path [declare namespace ns16='http://services.intervalintl.com/schema/product';declare namespace ns7='http://services.intervalintl.com/schema/common/intervalcommontypes';//ns16:GetProductTransactionResponse[1]/ns16:ProductTransactionList[1]/ns16:ProductTransaction[ns7:ProductTransactionId='1060']/ns7:TransactionTermList[1]/ns7:TransactionTerm[ns7:ProductTransactionTermId='2151']/ns7:ProductTransactionTermId[1]] : Exception:Missing content for xpath [declare namespace ns16='http://services.intervalintl.com/schema/product';declare namespace ns7='http://services.intervalintl.com/schema/common/intervalcommontypes';//ns16:GetProductTransactionResponse[1]/ns16:ProductTransactionList[1]/ns16:ProductTransaction[ns7:ProductTransactionId='1060']/ns7:TransactionTermList[1]/ns7:TransactionTerm[ns7:ProductTransactionTermId='2151']/ns7:ProductTransactionTermId[1]] in Response

I checked the request, the value is transfered,I don't know what went wrong here.