# Line connection between blocks

**URL:** <https://scilab.discourse.group/t/line-connection-between-blocks/998>\
**Category:** Scilab beginners\
**Created:** [July 8, 2025, 6:13am UTC](https://scilab.discourse.group/t/line-connection-between-blocks/998 "2025-07-08T06:13:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Fortunato](https://avatars.discourse-cdn.com/v4/letter/f/ecccb3/32.png) [@Fortunato](https://scilab.discourse.group/u/Fortunato)\
**Post date:** [July 8, 2025, 6:13am UTC](https://scilab.discourse.group/t/line-connection-between-blocks/998/1 "2025-07-08T06:13:19Z")

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I am trying to draw a PID using blocks; when I save the file and reopen always I find that some lines are zig-zag. Sometimes I redraw and it goes ok. I did not understand what should I have to do to avoid this behaviour.  
Best Regards

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**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\
**Post date:** [July 8, 2025, 11:55am UTC](https://scilab.discourse.group/t/line-connection-between-blocks/998/2 "2025-07-08T11:55:40Z")

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Hello,

See [Connections lines graphical bug in Xcos (#17373) · Issues · scilab / scilab · GitLab](https://gitlab.com/scilab/scilab/-/issues/17373)

S.

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**Author:** ![Fortunato](https://avatars.discourse-cdn.com/v4/letter/f/ecccb3/32.png) [@Fortunato](https://scilab.discourse.group/u/Fortunato)\
**Post date:** [July 8, 2025, 12:42pm UTC](https://scilab.discourse.group/t/line-connection-between-blocks/998/3 "2025-07-08T12:42:48Z")

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I see it, do you have any suggestion on how to draw lines, I need to draw a line out of a module which goes in three sum module.  
It does not allow me .  
Best Regards