计算ReHo时给出的错误。

我注意到我的 DPARSF 在计算 ReHo 的时候，在 Matlab 的命令窗口给出了这样的信息：

Read these 3D EPI functional images.    wait...
     Read 3D EPI functional images: "/home/yun/fMRI/Rest/FunImgNormalizedDetrendedFiltered/Subject001".........................................

     Calculate the rank of time series on voxel by voxelWarning: Conversion rounded non-integer floating point value to nearest uint16 value.
> In reho at 139
  In DPARSF_run at 607
  In DPARSF>pushbuttonRun_Callback at 920
  In gui_mainfcn at 96
  In DPARSF at 37
.Warning: Conversion rounded non-integer floating point value to nearest uint16 value.
> In reho at 139
  In DPARSF_run at 607
  In DPARSF>pushbuttonRun_Callback at 920
  In gui_mainfcn at 96
  In DPARSF at 37
.Warning: Conversion rounded non-integer floating point value to nearest uint16 value.
> In reho at 139
  In DPARSF_run at 607
  In DPARSF>pushbuttonRun_Callback at 920
  In gui_mainfcn at 96
  In DPARSF at 37
.Warning: Conversion rounded non-integer floating point value to nearest uint16 value.
> In reho at 139
  In DPARSF_run at 607
  In DPARSF>pushbuttonRun_Callback at 920
  In gui_mainfcn at 96
  In DPARSF at 37
.Warning: Conversion rounded non-integer floating point value to nearest uint16 value.
> In reho at 139
  In DPARSF_run at 607
  In DPARSF>pushbuttonRun_Callback at 920
  In gui_mainfcn at 96
  In DPARSF at 37
.Warning: Conversion rounded non-integer floating point value to nearest uint16 value.
> In reho at 139
  In DPARSF_run at 607
  In DPARSF>pushbuttonRun_Callback at 920
  In gui_mainfcn at 96
  In DPARSF at 37
.........
     Calculate the kcc on voxel by voxel for the data set.
     The reho of the data set was finished.

    Regional Homogeneity computation over, elapsed time: 91.55 seconds

然后每一个受试者进行计算的时候，都出现了这样的提示。
请问：

1. 问题出在什么地方，如何纠正？
2. 对得到的ReHo结果影响如何？