This problem is often detected when the BFA workbook (in Microsoft Excel) fails in trying to read its static configuration file. The BFA log will indicate a 500.0 error with the code 0x800700c1. Further investigation reveals that an attempt to read any static XML file causes the same error. Looking at the IIS 7 Failed Request Error Tracing output reveals the following error info:
HttpReason Internal Server Error
ErrorCode %1 is not a valid Win32 application. (0x800700c1)
In IIS7, find the application pool and open the Advanced Settings dialog. Find ‘Enable 32-bit Applications‘ and change the setting to FALSE. Apply the change.
KBA-01392; Last updated: October 13, 2016 at 11:42 am;
Keywords: BFA error; error reading files