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# Openstudio fails without stating errors found and blank eplusout.err file

Openstudio (1.1.0 and 3.1.0) fails just after starting simulation of a 20 story office block with 4 basements without showing the normal "program terminated energyplus terminated--error(s) detected". It just gives the red FAILED and if I open the eplusout.err file it's completely blank. Before this state it would show me some warnings in the error file but it was abruptly cut off at the end of the file, there also wasn't any severe errors only warnings.

I've already did diagnostic in sketchup, then the surface matching diagnostic in OS, both was successful. I don't know what to check anymore, can someone take a look at my file maybe?

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Are you running any measures, other than OpenStudio Results, as part of the workflow? Look in the out.osw file and look to see if any measures have errors which you can find by searching for step_errors. Looking at this file can also see the last measure that completed. Also try throwing away the run directory. I'm interested to see if eplusout.err is still being generated or if that is from prior attempt at run.

( 2021-03-10 12:19:45 -0600 )edit

Only running Add Output Diagnostics but it completes successfully. I have used the VRFDOAS measure earlier (I realised afterwards its an old measure) and it ran successfully, but I'm not seeing any errors (when there were errors) relevant to the HVAC system. Created a new run directory after I deleted it.

If I run in Energyplus the only error I see is the following: EOF encountered during read of ESO header records
probable energyplus error condition -- check eplusout.err (but it's blank)

( 2021-03-11 06:28:11 -0600 )edit

Could be something has changed related to Add Output diagnostics. If you remove that measure do you still have the same issue?

( 2021-03-11 10:43:58 -0600 )edit

Yes, exactly the same. I actually saw a couple more warnings when I added Add output diagnostics, but when I fixed them it went blank again. I have simplified and redid the model in sketchup but still ends the same.

Could this happen if spaces were drawn upside down by accident?

( 2021-03-11 11:09:06 -0600 )edit

No, that wouldn't do this. Most common cause might be OpenStudio failing for forward translate OSM to IDF, although then the eplousout.err file would not even be made. Could also be EnergyPlus crashing. I still want to see what happens if you just don't add that measure at all. It seems like you ran it one way (and maybe got a measure) ten changed it and that error appear to go away but it may have resulted in a corrupted file. I would like you to try to just skip that measure. If it runs fine, then we know that measure is introducing the problem.

( 2021-03-11 13:56:24 -0600 )edit

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The problem here was that there were spaces or zones without anything in them in the OSM file. After finding and deleting them it ran again. Can also be the cause when error file just stops abruptly. Would be nice to add a check in the initializing or translating to EP. Using the stdout file has been helpful to find errors not shown in the error file.

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