Diagnosis
You tried to move a field with fixed category 'C'. Fields that havecategory 'C' are fields in the data part of the condition table used.Fields from this data part can only be determined, but not used foraccess to data determination! For access, you can only use fields inthe key part of the condition table (SPACE or A category)!

System Response
The system refuses to move the field.

Procedure
Use another field or create another access that suits yourrequirements.