I am getting the following compile error attempting to move n existing 19.1 app to 20.1.

It is fine in 19.1 and I do not get what the issue is?

- Error 4391: D:\DataFlexWorkspaces\Basys\AppSrc\REST\EventManag er\CCSEventManagerStructures.pkg (ln 37) Illegal code placement Could not refind the original name in struct(-sub) definition.

The code is as below

Code:
Struct tServices
   String serviceID
   String  serviceName
End_Struct

Struct tSpecialConditions
   String conditionType
   String conditionValue
   String conditionStartDate
   String conditionEndDate
End_Struct

Struct tEventManagement
   String eventID
   String eventType
   String eventDescription
   String eventSubType
   String eventRecipientType
   String eventStartDate
   String eventEndDate
   tSpecialConditions[] SpecialConditions
   tServices Services[]     <,------------------------------------------error here?
   tSpecialAbsences[] SpecialAbsences
End_Struct