[Mristudio-users] not valid VTK data File

[gmak at poczta.onet.pl]

Hi.
I have a problem when I try to combine matrices. 
I have information " The file you want to load is not a valid VTK data file"
what may cause this problem?
I created two times Kimap and Hmap and there was the same message each time.
I correctly combine metrices in 25subjects and this trouble have in 2 subjects.
How to solve this problem?
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