Hello all, I'm new to this and I'm having problems running probtrackx2 with more than one target. Everything works fine when I have just one seed and one target, but when I try it with two target regions (for classification), I get the following error and the files seed_to_target are not created. save results *** Error in `/usr/share/fsl/5.0/bin/probtrackx2': double free or corruption (out): 0x0000000002a88b10 *** ======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7f12f50507e5] /lib/x86_64-linux-gnu/libc.so.6(+0x8037a)[0x7f12f505937a] /lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7f12f505d53c] /usr/share/fsl/5.0/bin/probtrackx2[0x42ef8a] /usr/share/fsl/5.0/bin/probtrackx2[0x432898] /usr/share/fsl/5.0/bin/probtrackx2[0x454a61] /usr/share/fsl/5.0/bin/probtrackx2[0x411e7f] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f12f4ff9830] /usr/share/fsl/5.0/bin/probtrackx2[0x4125f9] ======= Memory map: ======== 00400000-004fc000 r-xp 00000000 08:02 3284101 /usr/lib/fsl/5.0/probtrackx2 006fb000-006fd000 r--p 000fb000 08:02 3284101 /usr/lib/fsl/5.0/probtrackx2 006fd000-006fe000 rw-p 000fd000 08:02 3284101 /usr/lib/fsl/5.0/probtrackx2 01bc2000-25469000 rw-p 00000000 00:00 0 [heap] 7f12c8000000-7f12c8021000 rw-p 00000000 00:00 0 7f12c8021000-7f12cc000000 ---p 00000000 00:00 0 ..... Do you know what might be the reason for this? Thanks in advance! Rita