BGP initialization fails at the 256th router in a single AS

[anhndd]

Hello, I got this error when trying to simulate 1000 routers within the same AS

<!> Error: Cannot convert 4.29497e+09 to simtime_t: Out of range (-9223372.036854775807,9223372.036854775807), allowed by scale exponent -12 -- in module (inet::bgp::Bgp) MyNetwork.RUnctrl256.bgp (id=215547), during network initialization

Here is my configuration files:

BGPConfig.xml
IPv4Config.xml
OSPFConfig.xml

These should be changed to .ini and .ned:
omnetpp.txt
MyNetwork.txt

I think the problem is function calculateStartDelay in BgpConfigReader.h only allows to input unsigned char rtPosition and unsigned char rtPeerPosition which only allows to have maximum 255 routers within the same AS. I do not know if it is a standard or a bug in this case. Thank you.