In PowerBuilder 7 and later, every object in a DataWindow object must have a name. During migration, objects without names are assigned names based on the user-definable prefix settings, usually dw_1, dw_2, and so on. Since names are assigned sequentially, an object might be assigned a name already used by another object in the DataWindow object. This can cause unexpected behavior. For example, naming an unnamed report with a name already used for another DataWindow object, such as dw_2, could cause a GetChild/ShareData or Retrieve operation to find and use the wrong DataWindow object.
To work around this problem, select Design>Options in the DataWindow painter and modify the DataWindow object prefix on the Prefixes tab before migrating. After you migrate the DataWindow object, you can change the prefix back.
