After upgrade to last recommended VRP board E4GC can not be registered.
%Jan 18 19:39:16 2007 Quidway SRM/5/BOARD TYPE ERROR:Slot 7 is lan board, cannot register in gsr
%Jan 18 19:39:19 2007 Quidway VOS/5/ASSERT:slot:0,
If it temporary need to use LPU board which can't be registered it is possible to use USR VRP in this case, meanwhile such situation must be under control.
Analyze cased because we have several types of the same version VRP (exactly: USR,GSR and L3), due common hardware structure some boards of NE40 cannot be used on NE80 and back, meanwhile VRP are having some difference USR (Universal Switching Router) is for NE40 and GSR (Gigabit Switching Router) is for NE80.
That is only temporary solution, can be used in laboratory for emulation.