Error on data processing stage

[Indra Montserrat Fonseca Alfaro]

Hello! After importing mi .nii data on DIFF_PREP I filled in the "process imported data" but got the following error: 

endian_raw_in=BIG
original_columns=128
original_rows=128
slice=48
nim=33
phase_encode_direction='vertical'
x_field_of_view=224.000
y_field_of_view=224.000
rawimageformat='float'
bmatrixfile='x20150227_083628DTIhighisoSENSEs1101a1011.bmtxt'
slice_gap=0
slice_thickness=2.50000
image_plane='axial'
raw_image_path_filename='x20150227_083628DTIhighisoSENSEs1101a1011.path'
Loaded bmatrix
Index of image chosen for masking           0
% XMANAGER: Caught unexpected error from client application. Message follows...
% OPENW: Error opening file. Unit: 100
         File: /media/eli/4a72260c-4ecd-4ac1-a9d1-cde24f20a641/eli/tortoise/P
         xTractografia/x20150227_083628DTIhighisoSENSEs1101a1011_proc/x201502
         27_083628DTIhighisoSENSEs1101a1011_structural.hdr
  No such file or directory
% Execution halted at:  WRITE_ANAL_HDR    178 
%                       WRITE_ANALYZE      19 
%                       APPLY_GUI_SETTINGS   44 
%                       DIFFPREP_GUI_EVENT  263 
%                       XMANAGER_EVLOOP_STANDARD  478 
%                       XMANAGER          710 
%                       DIFFPREP_GUI      423 
%                       IDLRTMAIN         170 
%                       $MAIN$          

I didn't provide a structural file because I didn't know which one to chose, so I suspect this is the problem. I've read that the structural image must be a T2 weighted image with fat supression, but I don't know how to identify it among my files (I have them both in DICOM and NIFTI formats). Can anyone help me on this? 

Thank you!   

[Bob Dawe]

I realize this is several months old, but I had a similar problem and it was very frustrating, so I'm posting here in case anyone needs it.

The problem for me was that I had a space in the path to the directory that contained my Tortoise processing. Importing the data was no problem, but when I ran diffprep, I got the file opening error. Looking closely at my own error message, I saw that Tortoise was not liking the space; it had deleted it and so it was searching a nonexistent directory for the files it needed. For me, this issue persisted whether I was attempting to use a structural image or not. Finally, I simply renamed the directory (getting rid of the space) and everything worked as usual.

In Indra's case, I don't know if it might have been a space, or the path was too many characters, or Tortoise doesn't like the dashes, or something else, but I would look for something like that.