Difference between some result in sap 2000 and karamba

hi
i have a question
why are there difference between some result in sap 2000 and karamba
i tested it with same load and other parameters in both of them
for example in one structure, result for point displacement have difference in sap 2000 and karamba
Thank You

Hello can you give some details of what you are modelling and what differences you are seeing?