Build error: tmds driven from multiple places

[tocksin]

I'm trying to make my own build using the nestang as a starting point, but I've run into a strange problem. I can rebuild nestang no problems with the Gowin GUI for the 20k nano project. But when I try to make my own project, copy over the hdmi2 folder, etc, I run into this error in the hdmi2 serializer:

ERROR (EX2000) : Net 'tmds[2]' is constantly driven from multiple places("C:\git\TangTIA\src\hdl\hdmi2\serializer.sv":281)

I've put the LVDS drivers in my main set of code, so I don't think it's that. I'm building for a 9k nano, so I'm wondering if that's the problem instead. Any ideas? I linked to my github project below:

https://github.com/tocksin/TangTIA

update: I realize the code shouldn't even be executing this line because the 'define GW_IDE is enabled at the top, but it's reaching this part of the code for some reason. If I remove all other code except what's in the 'ifdef GW_IDE it works, but I'm still not sure why.

[tocksin]

I added the 'define GW_IDE at the top of the serializer.sv module and that seems to have fixed it. maybe something with defining something in a VHDL module doesn't carry over to Verilog?