Hallo,
during pre-processing (FSL 5.09) of animal data I encountered child killed: segmentation violation. It always happens when I try to use fieldmap unwarping with BBR. My fieldmap seems correct and is in the range of -1000 to 1000 after conversion to radians/sec. Running fieldmap unwarping directly on the EPI volume using fugue, the result seems reasonable. However, when I run pre-processing without fieldmap unwarping and BBR, it does work. I already checked for NaNs using fslmaths. In the Unwarping-Log, the "Unwarping shift map, in voxels" panel is empty (green; range 0.000000 0 0.000000). "White matter edges, overlaid on top of fieldmap image" and "Registration of fieldmap to highres" seemed to work. However, "Registration of initial_highres to highres without fieldmap correction" shows a blank (black) image where I woudl expect the initial_highres image to be. Same goes for "Registration of initial_highres to highres with fieldmap correction".
What could be the issue? Full logs and reports (incl. template) attached.
Log excerpt:
FATAL ERROR ENCOUNTERED:
COMMAND:
/usr/local/fsl/bin/fsl_sub -T 143 -l logs -N feat2_pre -j 15475 /usr/local/fsl/bin/feat /mnt/MRINAS/User/lohmeier/161216_fieldmap_test_20161206_100955_C0132_1_23/170110_new.feat/design.fsf -D /mnt/MRINAS/User/lohmeier/161216_fieldmap_test_20161206_100955_C0132_1_23/170110_new.feat -I 1 -prestats
ERROR MESSAGE:
child process exited abnormally
END OF ERROR MESSAGE
.....
/usr/local/fsl/bin/susan prefiltered_func_data_thresh 0.0 2.12314225053 3 1 1 mean_func 0.0 prefiltered_func_data_smooth
FATAL ERROR ENCOUNTERED:
COMMAND:
/usr/local/fsl/bin/susan prefiltered_func_data_thresh 0.0 2.12314225053 3 1 1 mean_func 0.0 prefiltered_func_data_smooth
ERROR MESSAGE:
child killed: segmentation violation
END OF ERROR MESSAGE
child killed: segmentation violation
while executing
"if { [ catch {
for { set argindex 1 } { $argindex < $argc } { incr argindex 1 } {
switch -- [ lindex $argv $argindex ] {
-I {
incr arginde..."
(file "/usr/local/fsl/bin/feat" line 309)
Error encountered while running in main feat script, halting.
child killed: segmentation violation
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