PALM running error

Good afternoon, Dr. Yan.
 
I performed a two sample T-test with ALFF. PALM could run without covariate images. However, error occurred when PALM ran with covariate images. Statistic set and error report were shown in the pics. And there is no space in all paths.
 
I had try  the analysis on Matlab2014a in Windows as well as on Matlab2016b in Linux system. Both of them reported the same error. How to deal with this error?  
 
Look forward to your reply.
 
Best wishes.
 
Becky
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Image icon ALFF_two_withTXTGMD.png20.09 KB
Image icon error.png16.59 KB

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Reason not clear.

Probably something wrong with your resliced gray matter density images?