# Wowza Caused Error when do-release-upgrade on ubuntu 14.04 LTS

**URL:** <https://community.wowza.com/t/wowza-caused-error-when-do-release-upgrade-on-ubuntu-14-04-lts/50564>\
**Category:** Wowza Streaming Engine\
**Tags:** server-administration\
**Created:** [January 15, 2018, 10:18am UTC](https://community.wowza.com/t/wowza-caused-error-when-do-release-upgrade-on-ubuntu-14-04-lts/50564 "2018-01-15T10:18:46Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Quan\_Sun](https://avatars.discourse-cdn.com/v4/letter/q/ecae2f/32.png) [@Quan\_Sun](https://community.wowza.com/u/Quan_Sun)\
**Post date:** [January 15, 2018, 10:18am UTC](https://community.wowza.com/t/wowza-caused-error-when-do-release-upgrade-on-ubuntu-14-04-lts/50564/1 "2018-01-15T10:18:46Z")

</div>

wowza stream engine 4.7.0 on ubuntu 14.04.5 LTS, want to upgrade it to 16.04.3 LTS, so runing sudo do-release-upgrade, and reported error:

…  
UnicodeDecodeError: ‘utf-8’ codec can’t decode byte 0x8b in position 1: invalid start byte

Checking the log (/var/log/dist-upgrade/main.log), found wowza caused the error:

2018-01-15 17:27:31,268 DEBUG \<Package: name:‘wowzastreamingengine-4.0.3’ architecture=‘amd64’ id:106718\>

2018-01-15 17:27:31,270 ERROR not handled exception:  
Traceback (most recent call last):

File “./xenial”, line 8, in   
sys.exit(main())

File “/tmp/ubuntu-release-upgrader-9h41\_686/DistUpgrade/DistUpgradeMain.py”, line 242, in main  
if app.run():

File “/tmp/ubuntu-release-upgrader-9h41\_686/DistUpgrade/DistUpgradeController.py”, line 1907, in run  
return self.fullUpgrade()

File “/tmp/ubuntu-release-upgrader-9h41\_686/DistUpgrade/DistUpgradeController.py”, line 1788, in fullUpgrade  
if not self.doPostInitialUpdate():

File “/tmp/ubuntu-release-upgrader-9h41\_686/DistUpgrade/DistUpgradeController.py”, line 943, in doPostInitialUpdate  
self.tasks = self.cache.installedTasks

File “/tmp/ubuntu-release-upgrader-9h41\_686/DistUpgrade/DistUpgradeCache.py”, line 807, in installedTasks  
for line in pkg.\_pcache.\_records.record.split("\n"):

UnicodeDecodeError: ‘utf-8’ codec can’t decode byte 0xae in position 353: invalid start byte

Should I remove wowza before do-release-upgrade and reinstall it after upgraded to 16.04.3 LTS? Thanks.