Hi,

i have 2 related list inside my Leads :
Products' related list (standard module)

Developer_Projects' related list (custom module)

i'm able to add products to leads using this piece of code (it's a working sample)  :

1.     $parentRecord=ZCRMRecord::getInstance("Leads","3225419000002017247");
2.     $junctionRecord=ZCRMJunctionRecord::getInstance("Products","3225419000002033149");
3.     $responseIns=$parentRecord->addRelation($junctionRecord);   

but i cannot add developer_projects to leads using this piece of code (i got an exception "the relation name given seems to be invalid") :

1. $parentRecord=ZCRMRecord::getInstance("Leads","3225419000002017247");
2. $junctionRecord=ZCRMJunctionRecord::getInstance("Developer_Projects","3225419000002018241");
3. $responseIns=$parentRecord->addRelation($junctionRecord);