# No serializers associated with the filename or extension for generating json changelog

**URL:** <https://forum.liquibase.org/t/no-serializers-associated-with-the-filename-or-extension-for-generating-json-changelog/3765>\
**Category:** General Discussion\
**Created:** [August 27, 2019, 12:57pm UTC](https://forum.liquibase.org/t/no-serializers-associated-with-the-filename-or-extension-for-generating-json-changelog/3765 "2019-08-27T12:57:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Roy](https://avatars.discourse-cdn.com/v4/letter/r/4da419/32.png) [@Roy](https://forum.liquibase.org/u/Roy)\
**Post date:** [August 27, 2019, 12:57pm UTC](https://forum.liquibase.org/t/no-serializers-associated-with-the-filename-or-extension-for-generating-json-changelog/3765/1 "2019-08-27T12:57:00Z")

</div>

$LIQB\_HOME/liquibase --driver=oracle.jdbc.OracleDriver \</div\>

&nbsp; &nbsp; &nbsp; --classpath=ojdbc7.jar \</div\>

&nbsp; &nbsp; &nbsp; --changeLogFile=work/ChangeLogs/hr\_$dt.json \</div\>

&nbsp; &nbsp; &nbsp; --url=“jdbc:oracle:thin:@vbox2:1521/pdbpoc” \</div\>

&nbsp; &nbsp; &nbsp; --username=hr \</div\>

&nbsp; &nbsp; &nbsp; --password=oracle \</div\>

&nbsp; &nbsp; &nbsp; --changeSetAuthor=rluo \</div\>

&nbsp; &nbsp; &nbsp; generateChangeLog

when I generate json format change log, I am getting below error, any suggestions will be highly appreciated.

Unexpected error running Liquibase: java.lang.RuntimeException: No serializers associated with the filename or extension ‘work/ChangeLogs/hr\_201908270146.json’

liquibase.exception.LiquibaseException: liquibase.command.CommandExecutionException: java.lang.RuntimeException: No serializers associated with the filename or extension ‘work/ChangeLogs/hr\_201908270146.json’

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