I have 3 network cards. Everything worked fine to install those three devices   
with the redhat-config-network. I can use these three cards without any   
problem. (It is configured as a router for an intranet with a leased line and   
a internet connection).   
   
If I try to apply changes I made with redhat-config-network now, an exception  
warning pops up with this message:    
   
Traceback (most recent call last):   
  File "/usr/sbin/neat", line 496, in on_applyButton_clicked   
    self.save()   
  File "/usr/sbin/neat", line 319, in save   
    self.saveDevices()   
  File "/usr/sbin/neat", line 326, in saveDevices   
    devicelist.save()   
  File "/usr/sbin/../share/redhat-config-network/netconfpkg/NCDeviceList.py",   
line 145, in save   
    os.write(fp2, ipc.network()+'/'+ipc.prefix()+" via "+route.Gateway+"\n")   
  File "/usr/sbin/../share/redhat-config-network/netconfpkg/ipcalc.py", line   
60, in network   
    return re.match("NETWORK=(\S+)", text).groups()[0]   
AttributeError: 'NoneType' object has no attribute 'groups'