Hi Afni Experts,
I wanted to touch base as I encountered an error using 3dQwarp (via auto_warp.py) that seems specific to Red Hat. The cluster runs Red Hat 7.3 and I tried both AFNI Precompiled binary linux_openmp_64: Jun 23 2017 (Version AFNI_17.1.12) and Precompiled binary linux_openmp_64: Apr 12 2017 (Version AFNI_17.1.01). I had AFNI installed by IT (root access) using the directions (https://afni.nimh.nih.gov/pub/dist/doc/htmldoc/background_install/install_instructs/steps_linux_Fed_RH.html) and I installed a separate local copy with the same error.

When running auto_warp.py : auto_warp.py -base tpl.nii.gz -input T1.brain2tpl.nii.gz -warp_dxyz 1 -qw_opts -penfac .01 -minpatch 13 -allinfast -Qfinal
I received the following error:
++ +++++++++++ Begin warp optimization: base=./base.rw.nii source=./anat.rw.qw_Allin.nii
++ AFNI warpomatic: 193 x 232 x 208 volume ; autobbox = 20..172 21..210 16..181 [clock= 31s 114ms]
lev=0 1..191 0..231 0..201: [first cost=-0.66608] ... done [cost:-0.66608==>-0.81349]
lev=1 patch=145x175x157 [clock= 7m 27s 972ms]........:[cost=-0.84611]:........ done [cost:-0.81349==>-0.85062 ; 16 patches optimized, 0 skipped]
lev=2 patch=109x131x117 [clock= 9m 37s 771ms]....................... done [cost:-0.85062==>-0.92735 ; 23 patches optimized, 4 skipped]
lev=3 patch=81x99x89 [clock= 11m 17s 130ms].......... done [cost:-0.92735==>-1.00095 ; 38 patches optimized, 26 skipped]
lev=4 patch=61x73x67 [clock= 12m 31s 953ms].............. done [cost:-1.00095==>-1.08824 ; 75 patches optimized, 50 skipped]
lev=5 patch=47x55x49 [clock= 13m 36s 968ms].......... done [cost:-1.08824==>-1.19102 ; 192 patches optimized, 151 skipped]
lev=6 patch=35x41x37 [clock= 14m 44s 912ms].................. done [cost:-1.19102==>-1.30727 ; 456 patches optimized, 354 skipped]
lev=7 patch=25x31x27 [clock= 15m 58s 739ms]................................. done [cost:-1.30727==>-1.43121 ; 1165 patches optimized, 1032 skipped]
lev=8 patch=19x23x21 [clock= 17m 22s 849ms]....................................................... done [cost:-1.43121==>-1.55941 ; 2563 patches optimized, 2350 skipped]
lev=9 patch=13x13x13 [clock= 19m 13s 740ms]..#**ERROR Failed in warping step
** ERROR - script failed


The only time I DO NOT receive an error is if I put the minpatch is set > 25. I used afni_system_check -check_all and did not see anything obviously missing.

I tested the exact same software (copied and installed on Ubuntu 14.04) and subject on a local cluster using Ubuntu and did not have any issues when using minpatch of 19 or less. I wanted to see if there are any reported issues that are related to red hat / 3dQwarp , or libraries from the install instructions (as IT installed with root access for me) that could explain this error.

Thanks,
Ajay