The convergence error "Uphill_energy" in the ZMM software typically occurs when the optimization algorithm is unable to find a downhill path towards the energy minimum. To avoid this error, you can try adjusting the parameters or initial conditions of the minimization stage. Experimenting with different values for LIMIT, LIMIN, KEE, STMIN, DESTL, and KOPT, or modifying your initial PDB file might help. It may also be useful to consult the ZMM software documentation or seek assistance from the software's support resources.