How to copy or Default a value to a Picklist(Read-Only) field
We initiate service request from Vehicle Page(Automotive Edition) through a web link. Here is the link
https://secure-ausomxhna.crmondemand.com/OnDemand/user/DefServiceRequestInsert?OMRET1=ServiceRequestDetail%3fServiceRequestDetailForm.Id%3dAHNA-17AZGF%26OMTGT%3dServiceRequestDetailForm%26OMTHD%3dServiceRequestDetailNav%26OCTYPE%3dOther%26ocTitleField%3dSR%2bNumber%26ocTitle%3d489430-72735998%26ocEdit%3dY&OMTGT=ServiceRequestEditForm&OMTHD=ServiceRequestNewNav&OMRET0=&ServiceRequestEditForm.Asset Id=%%%Row_Id%%%&ServiceRequestEditForm.Serial Number=%%%Serial_Number%%%&ServiceRequestEditForm.ZPick_5=%%%Indexed_Pick_0%%%&ServiceRequestEditForm.ZText_1=%%%ltTWS_Distributor_Ref%%%&ServiceRequestEditForm.ZText_35=%%%stModel%%%&ServiceRequestEditForm.ZPick_7=%%%stFactory_Code%%%&ServiceRequestEditForm.Machine=%%%Serial_Number%%%
All the fields in the link are getting copied over except the highlighted one.Tthe Field machine which is a Read-Only Picklist, is not getting populated with Serial#. Other than using web services, is there a way that I can copy the Serial# from Vehicle page to Vehicle field on Service request Page?