DSO activation Fails " Chacteristic value is not MAT N-1 Converted

Hi Experts,

We are facing error in DSO activation.

Activation is failing for a couple of materials and the exact error message it throws is as below

Characteristic value '21062868' of characteristic 0MATERIAL is not MATN1-converted.

We checked the conversion routine and could not find any issues there.

Moreover we also checked SID table for the 0material and found that the SIDs are getting generated for this materials ,still it throws error.

We have checked this material in R/3 (source for this DSO) material master and found it exists there .

Please help to resolve this .

Thanks.

Nayab