# Error installing logstash plugin
**URL:** https://discuss.elastic.co/t/error-installing-logstash-plugin/112265
**Category:** Logstash
**Created:** [December 18, 2017, 3:32pm UTC](https://discuss.elastic.co/t/error-installing-logstash-plugin/112265 "2017-12-18T15:32:50Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@diegopereiraeng](https://discuss.elastic.co/u/diegopereiraeng)
#### Post date: [December 18, 2017, 3:32pm UTC](https://discuss.elastic.co/t/error-installing-logstash-plugin/112265/1 "2017-12-18T15:32:50Z")
Hi,
I have installed logstash 5.5.1 using .tar.
The problem is only installing plug-ins.
I'm geting this error:
/logstash-5.5.1\> ./bin/logstash-plugin install file:///tmp/tcp-plugin.zip
Installing file: /tmp/tcp-plugin.zip
ERROR: An error occured when installing the: file:///tmp/tcp-plugin.zip, to have more information about the error add a DEBUG=1 before running the command., message: Could not find gem 'logstash-core (\>= 0) java' in source at ./logstash-core.
Source does not contain any versions of 'logstash-core (\>= 0) java'
I have tried a lot of steps, but didn't find anything that worked.
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### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [December 18, 2017, 4:09pm UTC](https://discuss.elastic.co/t/error-installing-logstash-plugin/112265/2 "2017-12-18T16:09:22Z")
Where does tcp-plugin.zip come from?
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### Author:  [@diegopereiraeng](https://discuss.elastic.co/u/diegopereiraeng)
#### Post date: [December 18, 2017, 7:54pm UTC](https://discuss.elastic.co/t/error-installing-logstash-plugin/112265/3 "2017-12-18T19:54:02Z")
From bin/logstash-plugin prepare-offline-pack logstash-input-tcp
I have tried using other plug-ins as jdbc and snmptrap
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 15, 2018, 7:54pm UTC](https://discuss.elastic.co/t/error-installing-logstash-plugin/112265/4 "2018-01-15T19:54:07Z")
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