# Trouble running toolkit on live table

**URL:** <https://forums.percona.com/t/trouble-running-toolkit-on-live-table/6823>\
**Category:** Percona Toolkit\
**Created:** [January 28, 2019, 10:47am UTC](https://forums.percona.com/t/trouble-running-toolkit-on-live-table/6823 "2019-01-28T10:47:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mytamhuyet](https://avatars.discourse-cdn.com/v4/letter/m/35a633/32.png) [@mytamhuyet](https://forums.percona.com/u/mytamhuyet)\
**Post date:** [January 28, 2019, 10:47am UTC](https://forums.percona.com/t/trouble-running-toolkit-on-live-table/6823/1 "2019-01-28T10:47:26Z")

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Hi

I’m trying to use percona toolkit to do a schema change on an active live table, and I’m having trouble at the creating triggers stage.

I’m running (something like)

pt-online-schema-change --max-lag 100000 --execute --alter “column\_name int” t=table

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<div class="post-metadata">

**Author:** ![carlos.salguero](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/carlos.salguero/32/20_2.png) [@carlos.salguero](https://forums.percona.com/u/carlos.salguero)\
**Post date:** [January 30, 2019, 6:52pm UTC](https://forums.percona.com/t/trouble-running-toolkit-on-live-table/6823/2 "2019-01-30T18:52:40Z")

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Which kind of troubles?  
Do you already have triggers for that table?  
Could you share the error message, the output of the SHOW CREATE TABLE \<your\_tablename\_here\>, and the triggers?