Veda,
The problem lies in the following 3 lines:
> -gltLabel 4 'Score*(t1-t2)' -gltCode 4 'Time : 1*t1 -1*t2 Score : 1*Score' \ # the effect of score is larger in Time1 than Time2
> -gltLabel 5 'Score*(t1-t2)' -gltCode 5 'Time : 1*t1 -1*t3 Score : 1*Score' \ # the effect of score is larger in Time1 than Time3
> -gltLabel 6 'Score*(t2-t3)' -gltCode 6 'Time : 1*t2 -1*t3 Score : 1*Score' \ # the effect of score is larger in Time2 than Time3
Are you trying to obtain the differences between any two time points in terms of the score effect? If so, this part 'Score : 1*Score' should be just 'Score : '
Gang