Hi Murad Ahmed,
Examine these 2 cases.
Case1
A Measuring point (Counter) created for recording Distance Traveled by a Car.
Case2
A measuring point (again a Counter), used to record the Fuel consumption in the Car.
In Case1, you have a meter fitted in the Car itself, which gives the Total Distance traveled. This reading you record in the Counter Reading in IK12. The Difference field is automatically updated.
In Case2, you read the amount of Fuel filled in the Car, from the Meter at the Gas Station, This reading you should record in the Difference Reading in IK12. Then the Counter Reading is automatically updated.
I hope you understand, in Case1, you can not know the Difference and in Case2 You can not have the Total readings.
About other doubts regarding Transfer of Measuring points, hope all the Measuring point invovled in the process have the same characteristics used.
The following document might be able to help you further.
Measurement Reading Transfer – A useful functionality
Jogeswara Rao K