Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

EPW file cannot be processed (custom, purchased weather file)

Hi all,

Context: I am trying to run a simulation using PAT/OpenStudio v2.9.0 and ResStock v2.2.4. I have inputed my own weather file into Worker initialization Script field using a dropbox direct download link, I have manually set the seed value in the ruby file run_sampling, and I have manually edited location, location-region, and vintage TSV files to reflect a location specific to the project. I have changed AMY = 1 in location weather year TSV.

I am trying to simulate a region in Georgia. I am using an EPW file that I purchased from WhiteBox Technology http://weather.whiteboxtechnologies.com/. I have renamed my EPW weather file from its original download file name (NC_ANDREWS-AP_722177_08.epw) to 0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw so that it is recognized by PAT. Before I did this, I was getting an error that the EPW file did not exist or was not an EPW file.

Currently, I am getting completed datapoint failure messages on all buildings of my simulation. Looking through one of the log text files, I discovered that the error is documented by this message:

[openstudio.EpwFile] <1> Bad start day of week in EPW file '/mnt/openstudio/analysis_3e5d6b81-eafa-4ac6-89ce-5440c92c46cf/weather/0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw' [openstudio.EpwFile] <1> Failed to parse EPW file header '/mnt/openstudio/analysis_3e5d6b81-eafa-4ac6-89ce-5440c92c46cf/weather/0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw' [openstudio.EpwFile] <2> EpwFile '/mnt/openstudio/analysis_3e5d6b81-eafa-4ac6-89ce-5440c92c46cf/weather/0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw' cannot be processed

Any idea what is going on? I am new to OpenStudio and PAT so I don't have a lot of intuition as to why this is happening. Do I have a faulty EPW file? I just downloaded Elements software so that I can edit the EPW file if necessary.

What do "bad start day of week," and "Failed to parse EWP file header" entail?

EPW file cannot be processed (custom, purchased weather file)

Hi all,

Context: I am trying to run a simulation using PAT/OpenStudio v2.9.0 and ResStock v2.2.4. I have inputed my own weather file into Worker initialization Script field using a dropbox direct download link, I have manually set the seed value in the ruby file run_sampling, and I have manually edited location, location-region, and vintage TSV files to reflect a location specific to the project. I have changed AMY = 1 in location weather year TSV.

I am trying to simulate a region in Georgia. I am using an EPW file that I purchased from WhiteBox Technology http://weather.whiteboxtechnologies.com/. I have renamed my EPW weather file from its original download file name (NC_ANDREWS-AP_722177_08.epw) to 0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw so that it is recognized by PAT. Before I did this, I was getting an error that the EPW file did not exist or was not an EPW file.

Currently, I am getting completed datapoint failure messages on all buildings of my simulation. Looking through one of the log text files, I discovered that the error is documented by this message:

[openstudio.EpwFile] <1> Bad start day of week in EPW file '/mnt/openstudio/analysis_3e5d6b81-eafa-4ac6-89ce-5440c92c46cf/weather/0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw' [openstudio.EpwFile] <1> Failed to parse EPW file header '/mnt/openstudio/analysis_3e5d6b81-eafa-4ac6-89ce-5440c92c46cf/weather/0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw' [openstudio.EpwFile] <2> EpwFile '/mnt/openstudio/analysis_3e5d6b81-eafa-4ac6-89ce-5440c92c46cf/weather/0979938_US_GA_Clarke_13059_0-20000-0-72311_33.97_-83.34_NSRDB_2.0.1_AMY.epw' cannot be processed

Any idea what is going on? I am new to OpenStudio and PAT so I don't have a lot of intuition as to why this is happening. Do I have a faulty EPW file? I just downloaded Elements software so that I can edit the EPW file if necessary.

What do "bad start day of week," and "Failed to parse EWP file header" entail?

EDIT: The issue was mispelled day of week in the EPW header! Tuesday was spelled as Tuesdayy!