Older twrp 3.0.2
I:Zip does not contain SELinux file_contexts file in its root.
I:Legacy property environment initialized.
Updater process ended with signal: 4
I:Legacy property environment disabled.
Error installing zip file '/emmc/lineage-14.1-20170225-UNOFFICIAL-vee7.zip'

Newer twrp 3.0.3 (mine)
sysutil: mmap(368078298, R, PRIVATE, 20, 0) failed: Out of memory
sysutil: Map of '/sdcard1/lineage-13.0-20170113-UNOFFICIAL-vee7_p713.zip' failed
Failed to map file '/sdcard1/lineage-13.0-20170113-UNOFFICIAL-vee7_p713.zip'
Error installing zip file '/sdcard1/lineage-13.0-20170113-UNOFFICIAL-vee7_p713.zip'