erro building and installing panda

Everything went ok until I tried to build panda:
cd ~/panda3d/panda
ppremake //runs fine, no problems

make[1]: *** [Opt3-Linux/express_express_composite1.o] Error 1
make[1]: Leaving directory `/root/panda3d/panda/src/express’
make: *** [express] Error 2

Thanks in advance !

It’s not at all clear what’s happening. You will need to provide some more context: what steps did you follow up to this point, what OS are you building on, what compiler you have installed, and so on.

But you might try following the INSTALL-MK instructions instead, to use the makepanda build script. This is a different way to build Panda that doesn’t use ppremake, and it is simpler.