# Can't see errors in wowza when there is compilation problem

**URL:** <https://community.wowza.com/t/cant-see-errors-in-wowza-when-there-is-compilation-problem/48434>\
**Category:** Wowza Developer Dojo\
**Tags:** wowza-streaming-server-java-api\
**Created:** [April 3, 2017, 8:57am UTC](https://community.wowza.com/t/cant-see-errors-in-wowza-when-there-is-compilation-problem/48434 "2017-04-03T08:57:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nicolas\_castillejos1](https://avatars.discourse-cdn.com/v4/letter/n/c57346/32.png) [@Nicolas\_castillejos1](https://community.wowza.com/u/Nicolas_castillejos1)\
**Post date:** [April 3, 2017, 8:57am UTC](https://community.wowza.com/t/cant-see-errors-in-wowza-when-there-is-compilation-problem/48434/1 "2017-04-03T08:57:42Z")

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Hello,

A problem I often meet with Wowza is that it is hiding errors when, for example, you have put a wrong version of a jar (I speek about wowza module development) that doesn’t implement some new methods that you call in your custom wowza module. Wowza says nothing and you loose lot of time trying debugging something that doesn’t have bug…

Do you know a solution for this problem, is there a way show these kind of errors ?

Nicolas

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**Author:** ![Michelle\_B](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/michelle_b/32/394_2.png) [@Michelle\_B](https://community.wowza.com/u/Michelle_B)\
**Post date:** [May 13, 2017, 1:19am UTC](https://community.wowza.com/t/cant-see-errors-in-wowza-when-there-is-compilation-problem/48434/2 "2017-05-13T01:19:24Z")

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Hi Nicolas,

You can add debug logs that indicate which module version you are using. For example, a best practice guide is to add an onAppStart log event that lists your module name and the version number. This would tell you that Wowza is loading your class correctly for that application instance, and which version it is recognizing.

Michelle