# Syncronize association between classes **URL:** \ **Category:** General Questions/Discussions\ **Created:** [October 25, 2008, 3:50am UTC](https://forums.visual-paradigm.com/t/syncronize-association-between-classes/10545 "2008-10-25T03:50:32Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Santm](https://avatars.discourse-cdn.com/v2/letter/s/e95f7d/32.png) [@Santm](https://forums.visual-paradigm.com/u/Santm)\ **Post date:** [October 25, 2008, 3:50am UTC](https://forums.visual-paradigm.com/t/syncronize-association-between-classes/10545/1 "2008-10-25T03:50:32Z")
I have class A mapped to Table A. And Similarly class B mapped to table B. Between Class A and class B I have drawn aggregate association where Class A has Class B with cardinality 0…1 to 0…\*. While trying to generate code, I am getting following error … ‘please syncronise association between A and B classes(has)’ Can someone tell me what am I missing? I have clearly given all rolesnames as required. ---
**Author:** ![LilianWong](https://avatars.discourse-cdn.com/v2/letter/l/919ad9/32.png) [@LilianWong](https://forums.visual-paradigm.com/u/LilianWong)\ **Post date:** [October 27, 2008, 11:34am UTC](https://forums.visual-paradigm.com/t/syncronize-association-between-classes/10545/2 "2008-10-27T11:34:36Z")
Hi Santm, Thanks for your post. Would you mind sending your project file for investigation? Thanks in advance! \*If you do not want the file to be accessed by public, please send your project file to [lilian@visual-paradigm.com](mailto:lilian@visual-paradigm.com) Best regards, Lilian Wong ---
**Author:** ![kelly7898](https://avatars.discourse-cdn.com/v2/letter/k/43a26b/32.png) [@kelly7898](https://forums.visual-paradigm.com/u/kelly7898)\ **Post date:** [May 17, 2010, 4:41pm UTC](https://forums.visual-paradigm.com/t/syncronize-association-between-classes/10545/3 "2010-05-17T16:41:18Z")
Thank you for the post. Hi guys, Im a newbie. Nice to join this forum.