What is CGAmbiguity and GS::CGError?

[ReignBough]

I am getting the following exceptions:

First-chance exception at <64-bit hex value> in ArchiCAD.exe: Microsoft C++ exception: CGAmbiguity at memory location <32-bit hex value>..

and

First-chance exception at <64-bit hex value> in ArchiCAD.exe: Microsoft C++ exception: GS::CGError at memory location <32-bit hex value>..

Anyone knows what these exceptions are and why it is showing?