This is the output i get in terminal.

          line 1: warning: Skipping unreadable file "/tmp/tmpBtxRUI"
         line 1: warning: Skipping unreadable file "/tmp/tmpn0UHZl"
         line 1: No data in plot

*** stack smashing detected ***: gnuplot terminated
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(__fortify_fail+0x48)[0xb74a0138]
/lib/tls/i686/cmov/libc.so.6(__fortify_fail+0x0)[0xb74a00f0]
gnuplot[0x809f61e]
/lib/tls/i686/cmov/libc.so.6[0xb74fdff4]
======= Memory map: ========
08048000-0815d000 r-xp 00000000 08:02 6390052    /usr/bin/gnuplot
0815d000-0816e000 rw-p 00115000 08:02 6390052    /usr/bin/gnuplot
0816e000-08392000 rw-p 0816e000 00:00 0          [heap]
b5800000-b587f000 rw-p b5800000 00:00 0 
b587f000-b5900000 ---p b587f000 00:00 0 
b5a00000-b5afc000 rw-p b5a00000 00:00 0 
b5afc000-b5b00000 ---p b5afc000 00:00 0 
b5bf4000-b5e01000 rw-p b5bf4000 00:00 0 
b5e01000-b5e92000 r--p 00000000 08:02 435574     /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
b5e92000-b5e94000 r-xp 00000000 08:02 4571140    /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
b5e94000-b5e95000 rw-p 00001000 08:02 4571140    /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
b5e95000-b5e98000 rw-s 00000000 00:09 2129946    /SYSV00000000 (deleted)
b5e98000-b5ef8000 rw-s 00000000 00:09 2097177    /SYSV00000000 (deleted)
b5ef8000-b5ef9000 ---p b5ef8000 00:00 0 
b5ef9000-b66f9000 rw-p b5ef9000 00:00 0 
b66f9000-b6759000 rw-s 00000000 00:09 2064408    /SYSV00000000 (deleted)
b6759000-b675f000 r-xp 00000000 08:02 304693     /usr/lib/libgailutil.so.18.0.1
b675f000-b6760000 rw-p 00006000 08:02 304693     /usr/lib/libgailutil.so.18.0.1
b6760000-b678f000 r-xp 00000000 08:02 304781     /usr/lib/libgnomecanvas-2.so.0.2001.0
b678f000-b6790000 rw-p 0002f000 08:02 304781     /usr/lib/libgnomecanvas-2.so.0.2001.0
b6790000-b67ce000 r-xp 00000000 08:02 304791     /usr/lib/libgnomeprintui-2-2.so.0.1.0
b67ce000-b67d0000 rw-p 0003d000 08:02 304791     /usr/lib/libgnomeprintui-2-2.so.0.1.0
b67d0000-b68ea000 r-xp 00000000 08:02 304684     /usr/lib/libxml2.so.2.6.31
b68ea000-b68ef000 rw-p 00119000 08:02 304684     /usr/lib/libxml2.so.2.6.31
b68ef000-b68f0000 rw-p b68ef000 00:00 0 
b68f0000-b6905000 r-xp 00000000 08:02 304502     /usr/lib/libart_lgpl_2.so.2.3.20
b6905000-b6906000 rw-p 00014000 08:02 304502     /usr/lib/libart_lgpl_2.so.2.3.20
b6906000-b6969000 r-xp 00000000 08:02 304789     /usr/lib/libgnomeprint-2-2.so.0.1.0
b6969000-b696b000 rw-p 00063000 08:02 304789     /usr/lib/libgnomeprint-2-2.so.0.1.0
b696e000-b6974000 r-xp 00000000 08:02 327774     /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-xpm.so
b6974000-b6975000 rw-p 00005000 08:02 327774     /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-xpm.so
b6975000-b697e000 r--p 00000000 08:02 461034     /usr/share/locale-langpack/nb/LC_MESSAGES/glib20.mo
b697e000-b6984000 r--s 00000000 08:02 1509754    /var/cache/fontconfig/945677eb7aeaf62f1d50efc3fb3ec7d8-x86.cache-2
b6984000-b6987000 r--s 00000000 08:02 1511564    /var/cache/fontconfig/e383d7ea5fbe662a33d9b44caf393297-x86.cache-2
b6987000-b6988000 r--s 00000000 08:02 1511558    /var/cache/fontconfig/c69f04ab05004e31a6d5e715764f16d8-x86.cache-2
b6988000-b6989000 r--s 00000000 08:02 1511543    /var/cache/fontconfig/4c73fe0c47614734b17d736dbde7580a-x86.cache-2
b6989000-b698c000 r--s 00000000 08:02 1511230    /var/cache/fontconfig/a755afe4a08bf5b97852ceb7400b47bc-x86.cache-2
b698c000-b6993000 r--s 00000000 08:02 1511222    /var/cache/fontconfig/6d41288fd70b0be22e8c3a91e032eec0-x86.cache-2
b6993000-b6996000 r--s 00000000 08:02 1511163    /var/cache/fontconfig/de156ccd2eddbdc19d37a45b8b2aac9c-x86.cache-2
b6996000-b699e000 r--s 00000000 08:02 1511145    /var/cache/fontconfig/e3de0de479f42330eadf588a55fb5bf4-x86.cache-2
b699e000-b69c0000 r--s 00000000 08:02 1510871    /var/cache/fontconfig/365b55f210c0a22e9a19e35191240f32-x86.cache-2
b69c0000-b69e8000 r-xp 00000000 08:02 2441217    /usr/lib/gtk-2.0/2.10.0/engines/libclearlooks.so
b69e8000-b69e9000 rw-p 00028000 08:02 2441217    /usr/lib/gtk-2.0/2.10.0/engines/libclearlooks.so
b69e9000-b6a07000 r--p 00000000 08:02 460416     /usr/share/locale-langpack/nb/LC_MESSAGES/gtk20-properties.mo
b6a07000-b6a0e000 r-xp 00000000 08:02 1181028    /lib/tls/i686/cmov/libnss_compat-2.7.so
b6a0e000-b6a10000 rw-p 00006000 08:02 1181028    /lib/tls/i686/cmov/libnss_compat-2.7.so
b6a10000-b6a18000 r--s 00000000 08:02 1511142    /var/cache/fontconfig/0f34bcd4b6ee430af32735b75db7f02b-x86.cache-2
b6a18000-b6a21000 r-xp 00000000 08:02 1