# Castor installation and launch error - help

**URL:** <https://castor-project.discourse.group/t/castor-installation-and-launch-error-help/121>\
**Category:** General Discussions\
**Created:** [October 9, 2019, 9:50am UTC](https://castor-project.discourse.group/t/castor-installation-and-launch-error-help/121 "2019-10-09T09:50:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sstute](https://avatars.discourse-cdn.com/v4/letter/s/8c91f0/32.png) [@sstute](https://castor-project.discourse.group/u/sstute)\
**Post date:** [October 9, 2019, 9:50am UTC](https://castor-project.discourse.group/t/castor-installation-and-launch-error-help/121/1 "2019-10-09T09:50:17Z")

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Hi,

Did you subscribe to the mailing list ? Otherwise you cannot send emails to it I think. The address is the good one.

Use the PATH environment variable in linux to get access to all neede binaries : [https://opensource.com/article/17/6/set-path-linux](https://opensource.com/article/17/6/set-path-linux)

root-config is a binary provided by ROOT, so if you use ROOT with GATE, then you should have it.​

It is used to provided correct links to ROOT libraries.

Same for CASToR, add the path to the bin directory into the PATH variable so that you don’t have to go inside this bin directory to execute CASToR.

Best

Simon