How to infer values in characteristics of material

Question

Hi Experts
I am trying to infer a characteristic (manufacturer name) based on another characterisitc (manufacturer number) for material master. I have done the following steps:
-created the characteristic (single value, Additional Value ticked, Not Ready for Input ticked)
-created the function (with manufacturer number as input parameter)
-created the function module for the above function
-created the dependency (type Procedure)
-assigned my dependency to the characteristics
-added the charateristics to a class
All these above objects are in Release/ active status.
In the dependency editor, I have put the following code to call my function/ function module Z_MFRNR_NAME
FUNCTION Z_MFRNR_NAME                
(ZZ_MFRNR = $ROOT.ZZ_MFRNR,          
ZZ_MFRNR_NAME = $SELF.ZZ_MFRNR_NAME).
In the function module, I am using CUOV_GET_FUNCTION_ARGUMENT (to get manufacturer number from table QUERY) and CUOV_SET_FUNCTION_ARGUMENT (to set manufacturer name in table MATCH).
The problem is that when I assign my class to a material in MM01/MM02, the function module is not called (I have a BREAK-POINT) hence the manufacturer name is not populated in the characteristic.
If I change the characteristic manufacturer name to 'Ready for Input' and try to enter a value manually, I hit my break-point but the manufacturer name returned by the function module is still not populated on the characteristic and I get a message 'Inconsistent values inferred for characteristic Mfr Name'. I checked the details of this message and it tells me that the value I entered manually and the value returned by the function module are incompatible with each other. This indicates that the function module is working fine as it is returning the manufacturer name.
Can someone please explain:
1. Why is the function module not called in the first place when the class is assigned to a material ie when there is no manuall entry to the characterirstic?
2. When there is manual entry and the function module is called, why doesnt the characteristic pick the value retured by the function module?
Am I missing something here.
Thanks in advance
Farooq

Answer 1

Hi,
Found the problem, I was assigning my dependency to the wrong characteristic. It should have been assigned to the Manufacturer number (inferring characteristic) rather than the Manufacturer name (inferred characteristic).
Farooq