This page describes how to fix a bug in the dll of EnergyPlus 7.1.0, build12 for Windows that may occur when exchanging a large amount of data in each time step. The error message that EnergyPlus writes to its .err file is
ExternalInterface starts first data exchange. Error: No digits were found in getDoubleCheckError. Further characters after number: Sending EXIT_FAILURE = : 1 **FATAL:Error in ExternalInterface: Check EnergyPlus *.err file.
To fix the bug, proceed as follows:
- Install the BCVTB version 1.1.0.
Download the bcvtb.dll for your architecture and copy it to the EnergyPlus directory, such as C:\Program Files\EnergyPlus-7-1-0. This will replace the existing file with the same name.