# Arrowtail and arrowhead with same rank?
**URL:** https://forum.graphviz.org/t/arrowtail-and-arrowhead-with-same-rank/1574
**Category:** Help
**Created:** [April 17, 2023, 8:56am UTC](https://forum.graphviz.org/t/arrowtail-and-arrowhead-with-same-rank/1574 "2023-04-17T08:56:46Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@wil](https://forum.graphviz.org/u/wil)
#### Post date: [April 17, 2023, 8:56am UTC](https://forum.graphviz.org/t/arrowtail-and-arrowhead-with-same-rank/1574/1 "2023-04-17T08:56:47Z")
Arrowhead and arrowtail work fine when I make a LR rank :
```
nodesep = 2; /* increase distance between nodes */
{ rank = lr; set1 set2 }
set1:1 -> set2:1 [dir=both, arrowtail=tee, arrowhead=crow label="1:n" fontname = "Arial"];
}
```
How can I have arrowtail and arrowhead with same rank ? It doesnt work for me…
```
nodesep = 2; /* increase distance between nodes */
{ rank = same; set1 set2 }
set1:1 -> set2:1 [dir=both, arrowtail=tee, arrowhead=crow label="1:n" fontname = "Arial"];
}
```
---
### Author:  [@steveroush](https://forum.graphviz.org/u/steveroush)
#### Post date: [April 17, 2023, 1:58pm UTC](https://forum.graphviz.org/t/arrowtail-and-arrowhead-with-same-rank/1574/2 "2023-04-17T13:58:46Z")
Please include a complete input file (reduced to a minimum that causes the problem, if possible). In particular, it is important to see how **set1** & **set2** are defined.
Also, please include any error and warning messages from **dot**
---
### Author:  [@wil](https://forum.graphviz.org/u/wil)
#### Post date: [April 18, 2023, 5:42am UTC](https://forum.graphviz.org/t/arrowtail-and-arrowhead-with-same-rank/1574/3 "2023-04-18T05:42:35Z")
Here is the full code. when I change `rank=same` to `rank=LR` eveything works fine…but it’s not what I want. (I want the tables side by side). There is no error.
```
digraph G
{
node[shape = none, fontname = "Arial" fontsize =14];
set1[ label=<
| Entité 1 |
Attribut
Attribut
Attribut
... |
>];
set2[ label=<
| Entité 2 |
Attribut
Attribut
Attribut
... |
>];
# layout
nodesep = 2; /* increase distance between nodes */
{ rank = same; set1 set2 }
set1:1 -> set2:1 [dir=both arrowtail=tee arrowhead=crow label="1:n" fontname = "Arial"];
```
}
---
### Author:  [@steveroush](https://forum.graphviz.org/u/steveroush)
#### Post date: [April 18, 2023, 12:09pm UTC](https://forum.graphviz.org/t/arrowtail-and-arrowhead-with-same-rank/1574/4 "2023-04-18T12:09:59Z")
Unfortunately, you have encountered a known bug ([When using HTML table and port, arrows are sometimes misplaced (#1357) · Issues · graphviz / graphviz · GitLab](https://gitlab.com/graphviz/graphviz/-/issues/1357)).
A fairly painless(?) work-around is to replace the single two-headed edge with two single-direction edges, like so:
```auto
digraph G
{
node[shape = none, fontname = "Arial" fontsize =14];
set1[ label=<
| Entité 1 |
Attribut
Attribut
Attribut
... |
>];
set2[ label=<
| Entité 2 |
Attribut
Attribut
Attribut
... |
>];
# layout
nodesep = 2; /* increase distance between nodes */
{ rank = same; set1 set2 }
//set1:1 -> set2:1 [Xdir=both arrowtail=tee arrowhead=crow xlabel="1:n" fontname = "Arial"];
// replace two-headed edge with two simpler edges
set1:1 -> set2:1 [arrowhead=crow xlabel="1:n" fontname = "Arial"];
set2:1 -> set1:1 [arrowhead=tee]
}
```
Giving:
