| <?xml version="1.0" encoding="UTF-8"?> | 
| <ValidationRule xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>Start_day_not_null</fullName> | 
|     <active>true</active> | 
|     <errorConditionFormula>DataMigration_Flag__c == false | 
| && IsChanged(Select_Time__c) && Not(Isblank(Select_Time__c)) | 
| && ISBLANK(Rental_Apply_Equipment_Set__r.Rental_Start_Date__c) | 
| && NOT(Rental_Apply_Equipment_Set__r.Cancel_Select__c)</errorConditionFormula> | 
|     <errorDisplayField>Asset__c</errorDisplayField> | 
|     <errorMessage>[备品预计出货日]不能为空</errorMessage> | 
| </ValidationRule> |