I'm getting an error in the Importing ROI data setup step. "Error using close ...Invalid file identifier" - I include the full text below...
I've simplified and standardized my file structure as well as limited the ROIs I'm including - but getting the same error -
right now I've just been reinitiating the setup which takes me a little further each time - but then I have to do this repeatedly until it is finished this step. 
Has anyone encountered and solved this problem - or any suggestions.
Thx
H 

Error using fclose
Invalid file identifier. Use fopen to generate a valid file identifier.

Error in read_hdr_raw (line 86)
fclose(fp);
Error in read_hdr (line 33)
[hdr,be] = read_hdr_raw(hname);
Error in nifti (line 27)
vol = read_hdr(fname);
Error in spm_vol_nifti (line 16)
N = nifti(fname);
Error in spm_vol>subfunc (line 124)
V = spm_vol_nifti(p,n);
Error in spm_vol>subfunc1 (line 77)
v = subfunc(P(i,:));
Error in spm_vol>subfunc2 (line 69)
V = subfunc1(P);
Error in spm_vol (line 54)
V = subfunc2(P);
Error in rex (line 146)
params.VF=spm_vol(temp);
Error in conn_rex (line 8)
[varargout{1:nargout}]=rex(varargin{:});
Error in conn_process (line 499)
[data{nroi1},namesroi{nroi},params]=conn_rex(Vsourcethis,Vmask{nroi},'summary_measure','mean','conjunction_mask',mask,'level',level,'scaling',scalinglevel,'select_clusters
Error in conn_process (line 11)
case 'setup', disp(['CONN: RUNNING SETUP STEP']); conn_process([0:5]);
Error in conn (line 1217)
conn_process('setup');
Error in conn_menumanager (line 117)
feval(MM.MENU{n0}.callback{n1}{1},MM.MENU{n0}.callback{n1}{2:end});
Error while evaluating figure WindowButtonUpFcn