What version of DOSBox are you using?

Your post is too vague. Please post more details. 😐

It basically means your program didn't find DPMI, which is nothing to worry about. Download CWSDPMI (google is your friend) and put it into the same directory. Play with it a little, you will manage to get it running with a bit of fiddling around.

Oh yeah, I forgot that DOSBox doesn't provide DPMI any more.

just like a real dos pc.

ms-dos (and dr-dos, for that matter) emm386 did provide dpmi, didn't it?

I think it's really time to have an official utilities pack for dosbox, including all 3rd-party programs any dosbox user needs somewhen, dos32a, cwsdpmi, perhaps others?

em386 didn't provide dpmi as far as I know.
only vcpi
but i can be wrong on this

I am pretty sure QBix is right. EMM just provided VCPI support. On the other hand, QEMM386 has its own built-in dpmi services program.

The only widespread DPMI providers that I've been aware of are Win9x/ME and CWSDPMI.

I remember Daggerfall was able to use it, so whatever DOS extender it used may have provided it when not already available too.