OpenEMS Backend jar: no main manifest attribute

English Forum Software-Development
1

Hi Team, I am trying to install an OpenEMS for our company, but I am having an issue on Jar file.
Can anyone help me or give some advice to make it work? Thank you very much in advance.

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2

Hi Moonlifes,

Did you follow the Build guide for OpenEMS Backend? There are two ways to build and run the jar file: in the Eclipse IDE or via console (Gradle):

https://openems.github.io/openems.io/openems/latest/backend/build.html

Alternatively please try if you can run the Release artifact from Github, e.g. openems-backend.jar

Regards,
Stefan

PS: I moved this post to a separate topic.

3

Hi Stefan,

Appreciate your response. Yes I have followed the build guide for OpenEMS but seems there are certain wrong configuration with my jar file. I am using Eclipse IDE since it is not working via console. Please check the image below when I am trying to do it on console. Thank you

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4

What’s the output of gradle tasks as suggested by the error message?

5

Hi Stefan, I just run the gradle tasks. Is this successful now?

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6

I suggested gradle tasks, because it gives you a list of all possible tasks. But you need to execute it in the root folder of your OpenEMS path, i.e. where you did git clone. Try the following on linux:

mkdir -p ~/git/
cd ~/git/
git clone https://github.com/OpenEMS/openems.git
cd openems
./gradlew tasks
./gradlew buildBackend

Apart from that I really recommend going through the Getting Started guide, because it covers all those steps (via Eclipse IDE) as well:

https://openems.github.io/openems.io/openems/latest/gettingstarted.html

Regards,
Stefan

7

Hi Stefan, I have done your suggested cloning but I am unsuccessful.
Do you have an idea on this? Thank you

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8

Sorry, have never seen this before. Maybe some firewall/proxy issue on your side? See…