Hi @falahtech,
Replied to this post.
frappe.ui.form.on('Event Participants', {
reference_docname: function(frm, cdt, cdn) {
var d = locals[cdt][cdn];
if (d.reference_doctype == "Contact") {
frappe.db.get_value("Contact", {"name": d.reference_docname}, "email_id", function(value) {
d.email = value.email_id;
});
} else if (d.reference_doctype == "Employee") {
frappe.db.get_value("Employee", {"name": d.reference_docname}, "personal_email", function(value) {
d.email = value.personal_email;
});
}
}
});
Please set/check your field according to.
I think your problem will solve.
Thank You!