# Xpm2ps output error with gromacs 2021 **URL:** \ **Category:** User discussions\ **Tags:** analysis-tools\ **Created:** [November 29, 2021, 3:22pm UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223 "2021-11-29T15:22:57Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![nevjernik](https://avatars.discourse-cdn.com/v4/letter/n/e47c2d/32.png) [@nevjernik](https://gromacs.bioexcel.eu/u/nevjernik)\ **Post date:** [November 29, 2021, 3:22pm UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/1 "2021-11-29T15:22:57Z")
GROMACS version: 2021 GROMACS modification: No With gromacs version 2021 xpm2ps makes a mess on x-axis of output .eps file (see attached file) I tried many combinations of .m2p options, but could not find numbers which gives correct output file. With gromacs version 2019 everything works fine. I used this command: `gmx xpm2ps -f ss.xpm -o output.eps -di ps.m2p -by 8` with file attached ![xpm2ps_error](https://europe1.discourse-cdn.com/flex017/uploads/bioexcel1/original/2X/8/8cae0569dd73aa1af39d1f3fd33434ba324f756b.png) I found that similar behavior previously was characterised as a (solved) bug, but seems it is still here, or I miss something? ps.m2p: > black&white = no ; Obsolete > titlefont = Times-Roman ; A PostScript Font > titlefontsize = 20 ; Font size (pt) > legend = yes ; Show the legend > legendfont = Times-Roman ; A PostScript Font > legendlabel = ; Used when there is none in the .xpm > legend2label = ; Used when merging two xpm’s > legendfontsize = 20 ; Font size (pt) > xbox = 0.2 ; x-size of a matrix element > ybox = 2.0 ; y-size of a matrix element > matrixspacing = 2.0 ; Space between 2 matrices > xoffset = 0.0 ; Between matrix and bounding box > yoffset = 0.0 ; Between matrix and bounding box > ;— Axis options; x-axis — > x-major = 200 ; Major ticks on x axis every … frames > x-minor = 100 ; Id. Minor ticks > x-firstmajor = 0 ; First frame for major tick > x-majorat0 = yes ; Major tick at first frame > x-majorticklen = 10.0 ; x-majorticklength > x-minorticklen = 5.0 ; x-minorticklength > x-label = ; Used when there is none in the .xpm > x-fontsize = 16 ; Font size (pt) > x-font = Times-Roman ; A PostScript Font > x-tickfontsize = 10 ; Font size (pt) > x-tickfont = Helvetica ; A PostScript Font > ;— Axis options; y-axis — > y-major = 10 > y-minor = 4 > y-firstmajor = 0 > y-majorat0 = no > y-majorticklen = 8.0 > y-minorticklen = 4.0 > y-label = > y-fontsize = 16 > y-font = Times-Roman > y-tickfontsize = 10 > y-tickfont = Helvetica ---
**Author:** ![ebriand](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/ebriand/32/2314_2.png) [@ebriand](https://gromacs.bioexcel.eu/u/ebriand)\ **Post date:** [November 30, 2021, 8:17am UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/2 "2021-11-30T08:17:10Z")
Can you upload the xpm file? Would be easier to look into it with a full example ---
**Author:** ![jalemkul](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/jalemkul/32/18_2.png) [@jalemkul](https://gromacs.bioexcel.eu/u/jalemkul)\ **Post date:** [December 1, 2021, 11:15am UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/3 "2021-12-01T11:15:41Z")
> [@nevjernik](#): > > x-major = 200 ; Major ticks on x axis every … frames > x-minor = 100 ; Id. Minor ticks Increase these values and you won’t get so many tick marks. If you have a very long trajectory, it may be more appropriate to have ticks every few tens of ns rather than every 1-2 ns. ---
**Author:** ![scinikhil](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/scinikhil/32/3483_2.png) [@scinikhil](https://gromacs.bioexcel.eu/u/scinikhil)\ **Post date:** [December 1, 2021, 11:32am UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/4 "2021-12-01T11:32:08Z")
I have encountered this issue. When i tried with previous versions it was fine. Even at below cases x-major = 10 ; Major ticks on x axis every … frames x-minor = 0 ; Id. Minor ticks ---
**Author:** ![nevjernik](https://avatars.discourse-cdn.com/v4/letter/n/e47c2d/32.png) [@nevjernik](https://gromacs.bioexcel.eu/u/nevjernik)\ **Post date:** [December 4, 2021, 10:04am UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/5 "2021-12-04T10:04:28Z")
Thanks, I thought it is of no relevance, but here it is: > **[ss.xpm](https://drive.google.com/file/d/1WyoLga9sfJmWH5XJBUtF1tZbiFSO37Xo/view?usp=sharing)** > > Google Drive file. Also, here is dssp command used: ```auto gmx do_dssp -f trajectory.xtc -s md.tpr -sc scount.xvg -o ss.xpm -tu ns -dt 0.1 ``` Trajectory is 500ns long. ---
**Author:** ![nevjernik](https://avatars.discourse-cdn.com/v4/letter/n/e47c2d/32.png) [@nevjernik](https://gromacs.bioexcel.eu/u/nevjernik)\ **Post date:** [December 4, 2021, 10:08am UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/6 "2021-12-04T10:08:19Z")
Thanks Justin but unfortunately I already tried many combinations of numbers, tried to find the logic, but it just doesnt make a sense in 2021 version (everything worked fine with 2019). Trajectory is not large, just 500ns. ps. sorry for delayed answer, I was really busy with other things ---
**Author:** ![ebriand](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/ebriand/32/2314_2.png) [@ebriand](https://gromacs.bioexcel.eu/u/ebriand)\ **Post date:** [December 14, 2021, 8:47am UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/7 "2021-12-14T08:47:05Z")
Looked into it, I can reproduce the x-axis bug with 2021 base version, however it was fixed in a subsequent release. With 2021.4, as well as current dev version, I get the expected result with regards to x-axis tick marks: ![output2021_4](https://europe1.discourse-cdn.com/flex017/uploads/bioexcel1/original/2X/5/5b0e5a32a54dc27b365398f0a2591b1ec6e6ed0d.jpeg) In any case, thanks for having taken the time to do such bug report! ---
**Author:** ![nevjernik](https://avatars.discourse-cdn.com/v4/letter/n/e47c2d/32.png) [@nevjernik](https://gromacs.bioexcel.eu/u/nevjernik)\ **Post date:** [January 10, 2022, 7:24pm UTC](https://gromacs.bioexcel.eu/t/xpm2ps-output-error-with-gromacs-2021/3223/8 "2022-01-10T19:24:39Z")
Thank you so much… (No facebook emoticons here, I really need them now to show appreciation for your support :) )