[Galaxy Ace II Android Development] btb55:
Thank you, I think there is enough free space, but maybe a missing partition? This is the install script from V4A

show_progress(0.1, 0);
ui_print(".................................");
ui_print(".................................");
ui_print("... ViPER|Audio™ ...");
ui_print("... 5.4 ...");
ui_print("... ...");
ui_print("... by ...");
ui_print("... guitardedhero ...");
ui_print(".................................");
ui_print(".................................");
ui_print("Mounting system...");
ui_print("Mounting data...");
ui_print("Mounting vendor...");
run_program("/sbin/busybox", "mount", "/system");
run_program("/sbin/busybox", "mount", "/data");
run_program("/sbin/busybox", "mount", "/vendor");
ui_print("Deleting existing ViPER4Android install...");
delete_recursive("/system/app/As");
delete_recursive("/system/app/AsUI");
delete_recursive("/system/priv-app/As");
delete_recursive("/system/priv-app/AsUI");
delete_recursive("/system/app/Ds");
delete_recursive("/system/app/DsUI");
delete_recursive("/system/priv-app/Ds");
delete_recursive("/system/priv-app/DsUI");
delete_recursive("/system/dolby");
delete_recursive("/system/etc/dolby");
delete("/system/lib/libstagefright_soft_ddpdec.so");
delete("/system/lib/soundfx/libdseffect.so");
delete("/system/lib/libdlbdapstorage.so");
delete("/system/lib/soundfx/libswdap-mod.so");
delete("/system/app/ViPER4Android.apk");
delete("/system/priv-app/ViPER4Android.apk");
delete_recursive("/system/priv-app/ViPER4Android");
delete_recursive("/system/app/ViPER4Android");
delete("/system/app/ViPER4AndroidFX-2.4.0.1.apk");
delete("/system/priv-app/ViPER4AndroidFX-2.4.0.1.apk");
delete_recursive("/system/priv-app/ViPER4AndroidFX-2.4.0.1");
delete_recursive("/system/app/ViPER4AndroidFX-2.4.0.1");
delete("/system/app/ViPER4Android FX-2.4.0.1.apk");
delete("/system/priv-app/ViPER4Android FX-2.4.0.1.apk");
delete_recursive("/system/priv-app/ViPER4Android FX-2.4.0.1");
delete_recursive("/system/app/ViPER4Android FX-2.4.0.1");
delete_recursive("/system/app/ViPER4Android_FX_A4.x");
delete_recursive("/system/priv-app/ViPER4Android_FX_A4.x");
delete_recursive("/system/app/Material_Dark_V4A");
delete_recursive("/system/priv-app/Material_Dark_V4A");
delete_recursive("/system/priv-app/MaterialDarkV4A");
delete_recursive("/system/priv-app/MaterialLightV4A");
delete("/system/lib/soundfx/libv4a_fx_ics.so");
delete("/system/lib/soundfx/libv4a_fx_jb.so");
ui_print("Extracting ViPER|Audio™ to system...");
package_extract_dir("system", "/system");
package_extract_file("runme.sh", "/tmp/runme.sh");
set_perm_recursive(0, 0, 0755, 0755, "/system/addon.d");
set_perm_recursive(0, 2000, 0755, 0755, "/system/bin");
set_perm_recursive(0, 0, 0755, 0755, "/system/xbin");
set_perm_recursive(0, 0, 0755, 0755, "/system/su.d");
set_perm(0, 0, 0777, "/tmp/runme.sh");
ui_print("Permissions set.");
ui_print("Running post-install script...");
run_program("/tmp/runme.sh");
ui_print("Cleaning up...");
delete("/tmp/runme.sh");
package_extract_dir("tmp", "/tmp");
set_perm(0, 0, 0777, "/tmp/mytweaks.sh");
run_program("/tmp/mytweaks.sh", "mytweak");
ui_print("Unmounting system...");
ui_print("Unmounting vendor...");
run_program("/sbin/busybox", "umount", "/system");
run_program("/sbin/busybox", "umount", "/vendor");
ui_print(".................................");
ui_print("<> Experience ViPER|Audio™ <>");
ui_print(".................................");
show_progress(0.2, 10);

I can see it uses partition '/vendor' Could this be why it fails to install. If it is could I change vendor to another partition?