amaya 8.1a win2000 - Bug Report

Hello,
If I try to print a Mathml file I get the following message:
Microsoft Visual C++ Debug Library
Debug Assertion Failed!
Program c:\Program Files\Amaya\Windows\bin\amaya.exe
File fprintf.c line 56
Expression str != NULL

My system is Microsoft Windows 2000 5.00.2195
Service Pack3

The processor AMD Atholon XP2000+

I hope you can through some light on this for me. Is there some file missing off my system?

Best Regards
        Howard Jones