# Changelog Parameters and Checksum Errors **URL:** \ **Category:** General Discussion\ **Created:** [July 22, 2010, 9:20pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639 "2010-07-22T21:20:00Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![pcleary00](https://avatars.discourse-cdn.com/v4/letter/p/54ee81/32.png) [@pcleary00](https://forum.liquibase.org/u/pcleary00)\ **Post date:** [July 22, 2010, 9:20pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/1 "2010-07-22T21:20:00Z")
I am getting a checksum error when trying to run a changelog file.  I am using parameters in the changelog file, and these parameters DO change, because they are passed in at runtime. I have that changeset “runAlways=true”, so it is supposed to always run. Is this supposed to fail?  Is there anyway I can get parameterized changelogs to run and have the checksum capability run appropriately? I am using Liquibase 2.0 rc4. Here is the exception: liquibase.exception.ValidationFailedException: Validation Failed 1 change sets check sum at liquibase.changelog.DatabaseChangeLog.validate(DatabaseChangeLog.java:137) at liquibase.Liquibase.update(Liquibase.java:106) … ---
**Author:** ![pcleary00](https://avatars.discourse-cdn.com/v4/letter/p/54ee81/32.png) [@pcleary00](https://forum.liquibase.org/u/pcleary00)\ **Post date:** [July 22, 2010, 9:20pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/2 "2010-07-22T21:20:00Z")
I think I may have answered my own question.  I replaced “runAlways=true” with “runOnChange=true”, and now it runs every time because the parameter changes, which is actually the desired behavior.  Sweet. ---
**Author:** ![nvoxland](https://avatars.discourse-cdn.com/v4/letter/n/87869e/32.png) [@nvoxland](https://forum.liquibase.org/u/nvoxland)\ **Post date:** [July 22, 2010, 9:20pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/3 "2010-07-22T21:20:00Z")
Glad you figured it out.  Thanks for the update Nathan ---
**Author:** ![tinky2jed](https://avatars.discourse-cdn.com/v4/letter/t/e99b99/32.png) [@tinky2jed](https://forum.liquibase.org/u/tinky2jed)\ **Post date:** [April 11, 2023, 4:44pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/4 "2023-04-11T16:44:36Z")
I’m happy you got your resolved. I have permissions files that I want runAlways so have them set runAlways:true, but they don’t always change and I get the same results: [2023-04-11 11:34:12] SEVERE [liquibase.integration] Validation Failed: 1 changesets check sum src/main/resources/liquibase/changelog/tenant/perms/grantPerms\_apps.sql::perms-apps::jwalker was: 8:25e863d98cb362ebb38212238a8c0df4 but is now: 8:e1ed8c700694b3d64c1c3e3d634d6939 but it is runAlways:true, so I would expect the checksum would not matter, it should just run? ---
**Author:** ![tinky2jed](https://avatars.discourse-cdn.com/v4/letter/t/e99b99/32.png) [@tinky2jed](https://forum.liquibase.org/u/tinky2jed)\ **Post date:** [April 11, 2023, 4:45pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/5 "2023-04-11T16:45:23Z")
so sorry, the problem is when it does change it fails validation as above, but I would expect as runAlways:true it should not matter if it changes, just run it either way. ---
**Author:** ![daryldoak](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/daryldoak/32/764_2.png) [@daryldoak](https://forum.liquibase.org/u/daryldoak)\ **Post date:** [April 11, 2023, 6:13pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/6 "2023-04-11T18:13:12Z")
runAlways:true does not allow the changeset to be modified. runOnChange:true allows the changeset to be modified. ---
**Author:** ![tinky2jed](https://avatars.discourse-cdn.com/v4/letter/t/e99b99/32.png) [@tinky2jed](https://forum.liquibase.org/u/tinky2jed)\ **Post date:** [April 11, 2023, 6:56pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/7 "2023-04-11T18:56:12Z")
Thanks Daryl. I just figured that out - runAlways is not a good name for the flag, it should be runNoChange. I got thing to work by having both runAlways:true and runOnChange:true. They should update the documentation to make it clear that it doesn’t always run, and that it can actually create an unexpected error. ---
**Author:** ![daryldoak](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/daryldoak/32/764_2.png) [@daryldoak](https://forum.liquibase.org/u/daryldoak)\ **Post date:** [April 11, 2023, 9:19pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/8 "2023-04-11T21:19:49Z")
runAlways:true is used to run a changeset on every liquibase deployment, but it expects that you are not modifying that changeset. runOnChange:true is for running a changeset everytime it is modified. You should not have to have both flags on the same changeset. ---
**Author:** ![tinky2jed](https://avatars.discourse-cdn.com/v4/letter/t/e99b99/32.png) [@tinky2jed](https://forum.liquibase.org/u/tinky2jed)\ **Post date:** [April 12, 2023, 5:13pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/9 "2023-04-12T17:13:51Z")
because runAlways does not “run always” (it fails if the file changed) I need to have both to ensure this script is run every deploy whether or not it has changed. Thus I need to have both of these in order to do that. If runAlways always run like it is described, then I would only need runAlways:true. ---
**Author:** ![nvoxland](https://avatars.discourse-cdn.com/v4/letter/n/87869e/32.png) [@nvoxland](https://forum.liquibase.org/u/nvoxland)\ **Post date:** [April 13, 2023, 1:24pm UTC](https://forum.liquibase.org/t/changelog-parameters-and-checksum-errors/639/10 "2023-04-13T13:24:41Z")
I created [RunAlways="true" still fails checksum errors · Issue #4125 · liquibase/liquibase · GitHub](https://github.com/liquibase/liquibase/issues/4125) to track the feature request to make runAlways run regardless of checksum validation Nathan