提取协变量时出错

按照COURSE中讲述的方法提取协变量，发现报错，

>> RPCov=load('rp_aSub_001.txt');
>> BCWCov=load('ROI_FCMap_Sub_001.txt')'
>>Cov=[RPCov,BCWCov];
??? Error using ==> horzcat
All matrices on a row in the bracketed expression must have the
 same number of rows.

附件是头动文件和ROI文件，请老师看看是哪里出问题了