# Error: Cannot write to simulation log file in bcvtb while using energyplus

I am using bcvtb software as interface between a python code and energyplus. In the ptolemy model being used i have 2 actors ( one for the python code and other for the enegyplus software ) who write information to each other and execute alternatively. The log files for the two have been named differently ( simulation.log and simulation5.log ). I am encountering the following error on carrying out the bcvtb simulation:

This error is probably not due to the modeling or code but might be arising due to some other conflict however i am not sure. Sometimes the execution runs smoothly but many times above dialogue box pops up. Why does this happen?

Edit: Is it possible that the multiple runs of the software leave something running in the background that is causing inconsistency and hence leading to the error ?

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As a workaround, Run the BCVTB as an Administrator, it should work. I don't really see why you'd have permissions problems on your desktop though. Is the log being used by another program?

( 2018-01-23 06:21:36 -0600 )edit

I don't think so. This is the only program i am running. However i've noticed that stopping the simulation via bacvtb does not shut down the energyplus simulation which goes on for some time. Is it possible that there is some program running from previous simulations or something? Also till now i used to first run the bcvtb.jar file. Then using the gui which would open i would open and run my .xml file. There is no option to run the bcvtb.jar as an administrator. Is there some other way that i must try?

( 2018-01-23 06:26:25 -0600 )edit

@Akash, launch a terminal an Admin (such as cmd.exe - find it in the list of programs, right click > run as admin), then go launch the bcvtb.jar. It's possible your E+ simulation that wasn't stopped could be using it... But if you reboot your machine (or kill all E+ processes), then try again, you shouldn't get this error anymore in that case. Did you try? Is the error still there?

( 2018-01-24 08:21:15 -0600 )edit

@Julien I did launch the terminal as an admin from where i ran the jar file, however the error persisted. Regarding the E+ processes, it does run for some extra time till the simulation is complete. During this period i am unable to delete any of the E+ output files as it says they are being used by the program. But the E+ program completes after some time as a proof of which i am able to delete the E+ output files. This error also arises after the simulation has run for some time. Is there anything else that i can try?

( 2018-01-29 02:43:14 -0600 )edit
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Hum, system.SystemCommand makes me think that simulation5.log is being written to by Python, is that correct? You are launching an external system command which runs your python script, but you may not be waiting for it to complete, and therefore it is possible you have two external python script trying to write at the same time... Perhaps you should share your project files?

( 2018-01-29 02:59:50 -0600 )edit