Energyplus simulation on Mac OS

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As the error message says, you do not have a WeatherData folder in /Applications/EnergyPlus-8-2-0/

EP-Launch looks for the WeatherData folder in a specific location only (/Applications/EnergyPlus-8-2-0/WeatherData/). More than likely you moved the WeatherData folder to a new folder location.

Also like @gmolina mentioned, you can run simulations through the command line. One thing to add to their response though is that 'runenergyplus' will use the most recently installed version of EnergyPlus. If you want to run a different version of EnergyPlus than the most recently installed, you need to create an environmental variable (ENERGYPLUS_DIR) of the directory with the EnergyPlus version you want to run.

You create an environmental variable like...

export ENERGYPLUS_DIR=/path/to/energyplus/to/run/

or

export ENERGYPLUS_DIR=/Applications/EnergyPlus-8-1-0/

You can see the value of the variable by calling...

echo $ENERGYPLUS_DIR

Then call the 'runenergyplus' script as normal.

Unfortunately, this is an bug. I posted the problem just last week.

https://github.com/NREL/EnergyPlus/is...

I am also getting the same error. Just downloaded and installed the latest EnergyPlus -8-4-0 on a macbook pro running OSX El Capitan.

The problem is that the EP-Launch Lite application in 8-4-0 is trying to find the weather files in the EnergyPlus -8-3-0 directory for some reason; which does not exist. Not sure how to fix this.

You can see below that the Launch Lite application is launched from the 8-4-0 folder but the launcher reads 8.3.0 and the error is searching for a folder which does not exist.

As pointed out previously. The command line execution works without any problems.

Hi there,

I also use OSx for simulation, but have never used the ep launch. What I usually do is to start the simulation from the command line. That is, you open the terminal (command line), go to the directory where your IDF is placed, and write

'runenergyplus name.IDF weather.epw'

Of course, replacing "weather" and "name" by valid files

Not sure if you need to add this script to the path (as Radiance and other tools require)

Hope it helps!