# Assert (sz \>= 2) in convertSPtoRoute **URL:** \ **Category:** Help\ **Created:** [June 5, 2021, 1:15pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689 "2021-06-05T13:15:59Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![marcobn](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/marcobn/32/392_2.png) [@marcobn](https://forum.graphviz.org/u/marcobn)\ **Post date:** [June 5, 2021, 1:15pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689/1 "2021-06-05T13:15:59Z")
Hi, I have some dot files that were working with no problem in version 2.44.1 and now run into an error in ortho.c , line 155. By simply comparing ortho.c in 2.44 and 2.47 I see that the line 155: `assert(sz \>= 2);’ has been added only in the new version. But now all my files are broken. A dot file is listed below. Any help is greatly appreciated! Marco Buongiorno Nardelli, PhD University Distinguished Research Professor University of North Texas CEMI, Center for Experimental Music and Intermedia iARTA, Initiative for Advanced Research in Technology and the Arts ArtSciLab, ATEC @ the University of Texas at Dallas Associate Fellow, IMéRA - Institut d’Études Avancée d’Aix-Marseille Université [http://ermes.unt.edu](http://ermes.unt.edu) > **[materials sound music - contemporary music, new media art](https://www.materialssoundmusic.com)** > > Music, Science and Data-Driven Composition > Contemporary music > New media art > Music theory and composition +++++++++++++++ test.dot ++++++++++++++++ digraph { model=subset pad=0.1 rankdir=LR ratio=0.8 size=“10,10” splines=ortho graph [fontname=“Helvetica Neue” fontsize=32 label=“Requiem - performer 2 layer 0” labelloc=t nodesep=0.01] node [fontname=“Helvetica Neue” fontsize=16 shape=rectangle] edge [arrowType=normal] 30 30 → 8 1 8 → 1 27 1 → 27 0 27 → 0 18 0 → 18 3 18 → 3 3 → 8 34 8 → 34 34 → 27 9 27 → 9 9 → 8 26 8 → 26 32 26 → 32 6 32 → 6 16 6 → 16 15 16 → 15 15 → 8 13 8 → 13 22 13 → 22 22 → 32 37 32 → 37 28 37 → 28 36 28 → 36 36 → 18 48 18 → 48 50 48 → 50 19 50 → 19 17 19 → 17 17 → 8 35 8 → 35 35 → 22 43 22 → 43 2 43 → 2 52 2 → 52 52 → 8 29 8 → 29 29 → 16 5 16 → 5 11 5 → 11 40 11 → 40 12 40 → 12 12 → 8 8 → 32 20 32 → 20 14 20 → 14 14 → 12 12 → 22 46 22 → 46 33 46 → 33 33 → 16 16 → 22 22 → 33 33 → 18 10 18 → 10 10 → 28 28 → 18 4 18 → 4 41 4 → 41 41 → 50 23 50 → 23 23 → 27 31 27 → 31 49 31 → 49 49 → 18 39 18 → 39 21 39 → 21 21 → 32 38 32 → 38 7 38 → 7 7 → 41 41 → 50 50 → 8 51 8 → 51 24 51 → 24 24 → 8 8 → 14 14 → 8 8 → 24 24 → 16 16 → 11 42 11 → 42 42 → 27 27 → 19 19 → 7 7 → 22 22 → 49 49 → 22 22 → 7 45 7 → 45 25 45 → 25 47 25 → 47 47 → 25 25 → 8 8 → 22 22 → 27 27 → 47 47 → 8 8 → 27 27 → 50 44 50 → 44 44 → 28 28 → 27 27 → 21 21 → 27 27 → 2 2 → 8 8 → 33 33 → 11 30 11 → 30 30 → 2 2 → 30 8 [label=“high low mezzo external”] 1 [label=“high high forte internal”] 27 [label=“low low mezzo internal”] 0 [label=“high high forte external”] 18 [label=“low high forte external”] 3 [label=“high high mezzo internal”] 34 [label=“low medium piano external”] 9 [label=“high low mezzo internal”] 26 [label=“low low mezzo external”] 32 [label=“low medium mezzo external”] 6 [label=“high low forte external”] 16 [label=“high medium piano external”] 15 [label=“high medium mezzo internal”] 13 [label=“high medium forte internal”] 22 [label=“low high piano external”] 37 [label=“middle high mezzo external”] 28 [label=“low low piano external”] 36 [label=“middle high forte internal”] 48 [label=“middle medium forte internal”] 50 [label=“middle medium mezzo internal”] 19 [label=“low high forte internal”] 17 [label=“high medium piano internal”] 35 [label=“middle high forte external”] 43 [label=“middle low mezzo external”] 2 [label=“high high mezzo external”] 52 [label=“middle medium piano internal”] 29 [label=“low low piano internal”] 5 [label=“high high piano internal”] 11 [label=“high low piano internal”] 40 [label=“middle high piano internal”] 12 [label=“high medium forte external”] 20 [label=“low high mezzo external”] 14 [label=“high medium mezzo external”] 46 [label=“middle low piano internal”] 33 [label=“low medium mezzo internal”] 10 [label=“high low piano external”] 4 [label=“high high piano external”] 41 [label=“middle low forte external”] 23 [label=“low high piano internal”] 31 [label=“low medium forte internal”] 49 [label=“middle medium mezzo external”] 39 [label=“middle high piano external”] 21 [label=“low high mezzo internal”] 38 [label=“middle high mezzo internal”] 7 [label=“high low forte internal”] 51 [label=“middle medium piano external”] 24 [label=“low low forte external”] 42 [label=“middle low forte internal”] 45 [label=“middle low piano external”] 25 [label=“low low forte internal”] 47 [label=“middle medium forte external”] 44 [label=“middle low mezzo internal”] 30 [label=“low medium forte external”] 45 [label=“middle low piano external” shape=circle style=filled] 49 [label=“middle medium mezzo external” shape=circle style=filled] 16 [label=“high medium piano external” shape=circle style=filled] 52 [label=“middle medium piano internal” shape=circle style=filled] 28 [label=“low low piano external” shape=circle style=filled] 9 [label=“high low mezzo internal” shape=circle style=filled] 32 [label=“low medium mezzo external” shape=circle style=filled] 15 [label=“high medium mezzo internal” shape=circle style=filled] 28 [label=“low low piano external” shape=circle style=filled] 28 [label=“low low piano external” shape=circle style=filled] 32 [label=“low medium mezzo external” shape=circle style=filled] 28 [label=“low low piano external” shape=circle style=filled] 49 [label=“middle medium mezzo external” shape=circle style=filled] 42 [label=“middle low forte internal” shape=circle style=filled] 1 [label=“high high forte internal” shape=circle style=filled] 14 [label=“high medium mezzo external” shape=circle style=filled] } ---
**Author:** ![steveroush](https://avatars.discourse-cdn.com/v4/letter/s/a9adbd/32.png) [@steveroush](https://forum.graphviz.org/u/steveroush)\ **Post date:** [June 5, 2021, 2:16pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689/2 "2021-06-05T14:16:58Z")
see: [Assertion error when using `dot` in `ortho.c` in `convertSPtoRoute` in graphviz 2.47.2 (not an issue in graphviz 2.46.1) (#2082) · Issues · graphviz / graphviz · GitLab](https://gitlab.com/graphviz/graphviz/-/issues/2082) ---
**Author:** ![smattr](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/smattr/32/85_2.png) [@smattr](https://forum.graphviz.org/u/smattr)\ **Post date:** [June 5, 2021, 4:19pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689/3 "2021-06-05T16:19:14Z")
Fixed in [fix incorrect return value in inside\_polygon (!1988) · Merge requests · graphviz / graphviz · GitLab](https://gitlab.com/graphviz/graphviz/-/merge_requests/1988) which should make it into the 2.47.3 release. Apologies for the inconvenience. ---
**Author:** ![marcobn](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/marcobn/32/392_2.png) [@marcobn](https://forum.graphviz.org/u/marcobn)\ **Post date:** [June 5, 2021, 7:34pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689/4 "2021-06-05T19:34:39Z")
Thank you Matthew! Is there any way I can get a patch for the homebrew installation on Mac? I am a composer, and I use GraphViz to generate my graphic scores, and I have a recording this week for which I need to generate the parts. Unfortunately I have only my laptop (I am out of town for this) and I do not have access to my studio computer that still has the 2.44.1. Should I try to reinstall from master on GitLab directly? Thanks again, marco ---
**Author:** ![smattr](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/smattr/32/85_2.png) [@smattr](https://forum.graphviz.org/u/smattr)\ **Post date:** [June 5, 2021, 8:21pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689/5 "2021-06-05T20:21:15Z")
I think Homebrew allows you to install older versions, right? Unless you need a particular feature from 2.47.2, you should be able to install 2.47.1 instead to work around this for now. ---
**Author:** ![marcobn](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/marcobn/32/392_2.png) [@marcobn](https://forum.graphviz.org/u/marcobn)\ **Post date:** [June 5, 2021, 9:05pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689/6 "2021-06-05T21:05:49Z")
No, but I downloaded the 2.47.1 snapshot from the website and compiled. It works! Thanks again for your help! marco ---
**Author:** ![scnorth](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/scnorth/32/89_2.png) [@scnorth](https://forum.graphviz.org/u/scnorth)\ **Post date:** [June 5, 2021, 9:11pm UTC](https://forum.graphviz.org/t/assert-sz-2-in-convertsptoroute/689/7 "2021-06-05T21:11:07Z")
Sorry for the trouble. If you are building from source, as an end user, that’s impressive.