Howdy-
OK, I see the issue, which I should have noticed from the command entered... The "-in_rois ..." option takes only *a single* file name as argument (that is why the program isn't finding the mask, either); that single file contains a map of all ROIs in the network. I believe at the moment that the two files entered after it contain separate ROIs; those need to be combined into a single file, for example using 3dcalc (if they don't overlap):
3dcalc -a test_resamp_addtROI_2func+tlrc. -b test_resamp_audcatROI_2func+tlrc. -expr 'a+2*b' -prefix MY_NETWORK.nii.gz
... and then you could run 3dNetCorr like:
3dNetCorr \
-inset pc09.p64_rest_run1_MEICA.spc.nii.gz \
-in_rois MY_NETWORK.nii.gz \
-fish_z -ts_wb_corr -mask p64_rest_run1.REF.mask.FBrain.MNI.nii.gz \
-prefix test_p64_netcorr
--pt