Failed Model Estimation --- There is no significant Voxels ?

During Preprocessing of Image Data, many of us face problem of Model Estimation and failed to extract significant voxels,  i raised this question on the forum of Researchgate,  i am sharing it here, so anyone facing problem of Model Estimation may find useful answers and methods to overcome this problem.   heres the Link:  


Thank You

Tamoor Malik

Yunnan University