LabVIEW FPGA: An internal software error in the LabVIEW FPGA Module has occurred

Hi,

I am trying to build a LabView FPGA VI. During compilation, I always get error stating "LabVIEW FPGA:  An internal software error in the LabVIEW FPGA Module has occurred.  Please contact National Instruments technical support at ni.com/support".  At the time, comiplation process is almost at the end.  "Final Timing (place and route)" shows as completed. When Checked the Xilinx log session, at the end it states that "  Process "Generate Programming File" completed successfully". However, I do not see any generated bitfile.

When clicked on error details, it shows following: 

LabVIEW: An unknown error occurred.

Error -2629 occurred at Error occurred while loading XML string. Invoke Node in niFpgaXml_PrettyPrint.vi->niFpgaWriteBitfileXml_Core.vi->niFpgaCompileWorker_CreateBitfile.vi->niFpgaCompileWorker_JobComplete.vi->niFpgaCompile_Worker.vi:6460001

Possible reason(s):

LabVIEW: An unknown error occurred.

I tried multiple times but so far no luck to generate bitfile for this VI.  What could be wrong here?

I am using Labview 2013